I assume -- I hope -- Fodor will respond. We have the makings of an interesting debate here (but perhaps Fodor will replace references to spandrels with references to pendentives?).
Saturday, November 10, 2007
Do You Believe in Sociobiology and Law? - Chapter 5
Saturday, November 03, 2007
Terry Anderson on Evidence Visualization and Argumentation Schemes; Two Next Big Things in Legal Theory
See the advance copy of Terence Anderson's paper, Visualization tools and argument schemes revisited, Law, Probability and Risk Advance Access published on November 2, 2007. doi:10.1093/lpr/mgm036Anderson discusses (i) evidence diagramming and (ii) some argumentation schemes proposed by Doug Walton and Tom Gordon.
To get access to Anderson's paper, (i) get a password from your employer or librarian (if, that is, your employer or librarian had the wisdom, prescience, and good sense to purchase a group subscription to Law, Probability and Risk), (ii) ask Terence Anderson of the University of Miami School of Law for a preprint, (iii) wait until the hard copy of Law, Probability and Risk's special issue on evidence visualization in legal settings arrives in your library late this month (November 2007) or early next month (December 2007), or (iv) access Anderson's paper by going to WESTLAW ca. in or after the month of November, 2008. To see a draft of Anderson's original conference paper, go here.As you might have inferred by reading the frequent posts on this blog about visualization, I think it is more probable than not that evidence visualization may be a next big thing -- a big development -- in theorizing about the workings of evidence and inference in legal settings such as trials and in pretrial and in prelitigation investigation.
I do not say that visualization of evidential inference is the next big thing -- because (I predict) it will soon become apparent -- it is already becoming apparent -- that work on evidential inference has profound implications for law in general and and for general theorizing about law. And growing awareness of this development will also prove to be a big next thing in legal theory -- unless, of course, the economists manage to convince a too-compliant legal audience that problems of inference are nothing more than problems of preference and choice, which I pray will not happen.
In the long run advances in inference technologies and strategies in other fields should ensure that lawyers ( even academic lawyers :-) ) will resist the seductions of economic theory and will continue to pay close attention to the structure of inference. (May I say this: (i) no one ever promised evidence theorists a rose garden; (ii) inference is not an easy nut to crack; and (iii) evidential inference is probably every bit as hard to understand as the human brain [and how could it be otherwise?]. But these facts are no justification for taking the easy way out -- for refusing to struggle with the question of the nature -- or natures -- of inference.)
Saturday, October 27, 2007
One More Advance Paper on Visualization of Evidence and Inference
This paper happens to be mine. See Peter Tillers,
Introduction: visualizing evidence and inference in legal settings
Law, Probability and Risk Advance Access published on October 27, 2007.
doi:10.1093/lpr/mgm006 (But the diagram that appears above is just for show; it does not appear in this paper.)The above link will expire when the hard copy of the paper appears. If you don't have a subscription to the journal Law, Probability and Risk, your employer or your law library may have a group license.
The paper will be available in about 12 months via WESTLAW.
Finally, a draft of the paper (substantially the same as the final version) is available at SSRN. Here are a few extracts (sans footnotes) from an earlier draft of this short paper:
One reason I am interested in visualization of evidence and inference is that I suspect and hope that visualization of evidence and inference can make the logic of formal analytical methods such as Bayesianism more readily intelligible to so-called ordinary people – to people such as judges, jurors, law teachers, and law students, to people such as me.I am interested in visualization for another reason: I also suspect that visualization may help to remedy or ameliorate certain cognitive limitations that afflict even very extraordinary people, even people with extensive training in logic and mathematics, for example.
These two conjectures of mine can be stated in the following deliberately-suggestive way: I suspect that visualization can make it possible for the extraordinary computational capacity of the ordinary brain to do a better job of taking advantage of whatever assistance explicit formal argument about evidence is capable of providing.
Whether some complexities and nuances of real-world evidence and inference in legal proceedings are beyond the limits of formal analysis is still an open question. But I have a theoretical prejudice that bears on the question of how complex inference should be managed and addressed: I suspect that the people who tend to believe that the solution to the problem of complexity is generally to wash out some details – I suspect that the people who think we need simple and simplifying heuristics are on the wrong track. I suspect that the devil is generally in the details and I suspect that washing out detail generally degrades rather than enhances inferential performance. If I am right about this, every effort should be made to develop tools that makes it possible for human decision makers to increase (rather than decrease) the number of evidential premises and evidential inferences that decision makers should try to consider when they address uncertain factual hypotheses.
Having said that attention to detail is important, I hasten to say that large amounts of detail do present a serious problem, particularly for the enterprise of developing and deploying formal argument about evidence and inference. I take it as gospel that assessment of the sort of evidence ordinarily found in real-world litigation (and in many other decision making situations) usually involves numerous evidential premises and numerous evidential inferences. An abundance of evidentiary and inferential detail presents a serious difficulty for the dream of explicit and comprehensive formal analysis of evidence in legal proceedings. As the number of items of evidence increases and as the number of pertinent possible inferences increases, the resources required to consider the inferences suggested or supported by a body of evidence increases exponentially. If a human actor who uses a formal method of analysis (such as Bayesianism) must allocate even a very small increment of time – one or two or three seconds, let us say – to each premise and to each step in a complex evidential argument, it becomes hard to imagine how a comprehensive explicit formal analysis of even a relatively small amount of evidence presented in a legal proceeding can ever be done by any real human being. Furthermore, the difficulty of just keeping in mind all of the necessary or important parts of an inferential argument (including its evidential premises) seems to increase enormously as the number of evidential premises and inferential links increases; the task is akin to trying to play n-dimensional chess blindfolded.
&&& I am trying to lead graph theorists down a particular garden path. I have noticed (and I suspect that many other people have noticed) that when graph theorists try to explain themselves, they often use visual images as well as mathematical expressions and equations to describe their reasoning. I imagine (but I don’t really know) that some graph theorists would explain their use of visual images as an unfortunate but necessary concession to the intellectual limitations and weaknesses of dunces such as P. Tillers, who often have trouble following lengthy arguments made only with mathematical expressions. But I wonder if this sort of condescending (though entirely accurate) response offers backhanded support for the conjecture that visual images are sometimes excellent vehicles for getting ordinary human brains to work the way we want them to work – and the way we think that our brains, if properly assisted, can work.
Seek and Ye Shall Find ... Torts, Crimes & Sexual Misconduct
The Associated Press has looked -- for six months -- and it has found (so the AP proclaims) widespread sexual misconduct by secondary and and primary school teachers. See Martha Irvine & Rovert Tanner, Sexual Misconduct Plagues US Schools.
This "discovery" of sexual misconduct by teachers naturally invites the question: How real singular or extraordinary is the "clergy abuse scandal" -- whose "discovery" won a Pulitzer Prize for some Boston Globe reporters?
The authors of the AP article indirectly raise the question themselves:
The findings [of the AP investigation] draw obvious comparisons to sex abuse scandals in other institutions, among them the Roman Catholic Church. A review by America's Catholic bishops found that about 4,400 of 110,000 priests were accused of molesting minors from 1950 through 2002.A quick reading of the AP article might suggest that there is no real comparison between the two scandals: the article reports that 2570 educators were sanctioned for sexual misconduct 2001-2005 and that 4,400 of 100,000 priests were accused of sexual misconduct from 1950 through 2002, but the article notes there are roughly "3 million public school teachers nationwide." However, there is a difference between a charge or accusation of abuse and an official finding of sexual misconduct. Moreover, the sanctions against teachers cover only a five year period, and not a fifty-two year period. (One might surmise that perhaps ca. 25,000 teachers were reported to have been "sanctioned" from 1950-2002.)Clergy abuse is part of the national consciousness after a string of highly publicized cases. But until now, there's been little sense of the extent of educator abuse.
The AP article itself notes the following (thoroughly hyperbolic-sounding) claim:
One report mandated by Congress estimated that as many as 4.5 million students, out of roughly 50 million in American schools, are subject to sexual misconduct by an employee of a school sometime between kindergarten and 12th grade.Well, there's a stunner for you!
In the next sentence, however, the AP article notes: "That figure [4.5 million] includes verbal harassment that's sexual in nature."
Where does this qualifier -- the estimate includes verbal abuse -- where does this qualifier leave us? If we (i) split the baby -- i.e., the estimated total number of incidents of abuse --, (ii) prune away "school employees" who are not teachers, and (iii) somewhat reduce the estimated number of abusers to take into account that some (indeterminate number of) abusers are repeat abusers, perhaps we end up with two million or so (one million?) teachers in American schools who are child sex abusers during, say, a ca. 12-year period. The number of actual incidents of sexual misconduct, one presumes (or, in a sense, hopes), exceeds the number of accusations of sexual misconduct (but one should not entertain this assumption lightly).
Even with all of these qualifications in mind, one might still have reason to speculate that the proportion of abusers among school teachers is substantially greater than among Catholic clergy.
Well now, that's an interesting bit of speculation! Suppose this speculative thought turns out to be true -- and a bit of research reveals that some serious scholars who have studied the question directly and systematically assert that it is true that school teachers are more prone to abuse children than Catholic clergy are.
If the rate of sexual predation by school teachers against minors is in fact higher than the (past or present) rate of such sexual predation by Catholic clergy, is it fair to think of the Catholic clergy as being riddled with sexual predators?
Let's go one step further: Is it possible that the incidence of sexual abuse of children by adults is much higher in the population "parents of minor children" than it is among either the Catholic clergy or school teachers? If this possibility turns out to be true, what are we to make of the "Catholic clergy abuse scandal"?
One more question: Does the American litigation system yield accurate pictures of the ailments that afflict our society? Or does it take decades of retrospection to figure out "what really happened" in our society at large? (My guess is that the latter guess is more true than the former.)
Do You Believe in Sociobiology and Law? -- Chapter 4; A Response to Jerry Fodor
Do You Believe in Sociobiology and Law? -- Chapter 3; "Immediate Deadly Intent" and Paul Ekman's System of Facial Coding
Once the cognitive revolution wrought by Chomsky was under way, nurture came tumbling down. The present imperative to find genes for absolutely everything reinforces the imbalance. Evolutionary psychology now propounds imaginative explanations of things that we do as adaptations acquired in our prehistoric past, while Chomsky has become an old fogey, complaining that we do not know enough about the brain, or about early human beings and their environment, to speculate on evolutionary pressures. (I agree.) But the turn to innate cognitive structures as opposed to socially acquired habits owes more to him than anyone else.P. Tillers on Ekman:&&&
... Now universal emotions have returned with a vengeance. Paul Ekman led the charge, in parallel to but independently of Chomsky’s cognitive revolution. After doing clinical work on emotions and the body, and a stint as a US army psychologist, he travelled to New Guinea to see for himself, and made observations opposite to those of his predecessors. His conclusions are much like Darwin’s. They are now being enormously bolstered by brain research. At least this much is known for sure: one of the oldest parts of the human brain, the amygdala, is activated by immediate fear, and that is a fact about nature, not nurture, for everyone on the planet.
This is not an academic issue. ... The War on Terror supports research to design computer programs based on Ekman’s Facial Action Coding System, which will pick out in passenger queues the faces of people planning to blow up planes; Ekman’s personal website lists a project aimed at detecting expressions of IDI – Immediate Deadly Intent. He also plans to process pixels in order to expose a demeanour that betrays ‘lies about the intent to commit a harmful act’. Very roughly speaking, much of the cognitive science community thinks this approach is right on, even if IDI is taking things too far. Some anthropologists think it is nuts, megalomaniac.
Nurture did not stay tumbled down for long. All sorts of pressing criticisms of nature began to emerge. The debate now infects every branch of the human sciences. Nature may still be winning, for the moment, almost everywhere, but much less is settled than one might have expected. ...
If you look at me crossly -- animal-like, as it were --, I will infer hostile intent. I may even arrest and imprison you -- to prevent a deadly attack. And I have a facial chart in my hip pocket to back me up.I must confess that this sort of stuff -- stuff like Paul Ekman's IDI, that is -- strikes me as absurd; it strikes me as not much better than phrenology. See P. Tillers, Unnatural Lie Detectors (Feb. 5, 2006). It would strike me as even more absurd (and frightening) to find that people in Homeland Security really take this sort of stuff seriously. (Rewrites, or updating, of 1984 and Brave New World seem to be called for -- this time with a narrative that emphasizes the dangers of government reliance on shoddy science.)
Thursday, October 25, 2007
Expert Testimony about Credibility, and the State of Legal Scholarship
Question: What prompted the most recent wave of my unease?
Answer: I was frantically preparing for class and I discovered the interesting Texas case Schutz v. Texas, 957 S.W.2d 952 (Tex.Crim.App. 1997).
As I wrote in my class notes, the opinion of the Texas Court of Criminal Appeals in this case -- a case involving charges of aggravated sexual assault against a young child -- has "an elaborate but useful discussion ... of whether various types of expert evidence do or do not amount to prohibited opinion about the truthfulness of witnesses such as children. Cases in various states are surveyed. Court thinks that the prohibition in Rule 608(b) applies, in principle, to expert testimony about credibility or factors that affect the credibility or truthfulness of a witness. The issue is what forms of expert testimony amount to opinion about truthfulness vel non." I also discovered that the court had assembled, plainly after much labor, a comprehensive table (in an appendix) summarizing what forms of expert testimony affecting credibility and truthfulness are and are not admissible. I further found a simple but incisive concurring opinion and I also found a dissenting opinion that raised some excellent questions about the court's approach.
Well now -- I thought to myself -- this case is quite a find. The problem of sexual abuse of children is important. Texas is a big and populous state. The credibility of witnesses is almost always important in child abuse prosecutions. Experts or supposed experts are playing an increasingly important role in such criminal trials. And the question of the extent to which experts can give evidence that speaks to the believability, credibility, and truthfulness of witnesses who report being sexually abused is important. With these thoughts in mind, I did a LEXIS search for law journal articles about the Texas court's important and thoroughly-researched opinion in Schutz about this last question.
Question: What do you think I found?
Answer: Almost nothing.
I found only three brief references to Schutz in three law journal articles. Keep in mind that the Tex. Ct. Crim. App. decided Schutz and issued its opinion ten (10) years ago.
Something is wrong, isn't it?
N.B. Practicing lawyers do not think litigation and trials are unimportant. Judging by the growth of litigation departments in law firms during the last several decades, practicing lawyers (not to speak of judges) think litigation is perhaps more important than it ever was.
So what explains the paucity of academic commentary on cases such as Schutz? More important, what is the justification for this barren academic garden? (Note, the justification -- if any -- is not the importance of "theory." Good theorizing by legal academics can have very important "practical" implications. [Some people even believe that any theory worth its salt must have practical, or real-world, implications. I don't go that far. Still, the academic world should not be indifferent to "law in action.")
I shoot form the hip in this post. The reader will forgive me, I trust. I will return to this topic later.
Monday, October 22, 2007
Comparative Numbers
World Series: 3,718
Fires in California: 2,816
Turkey-Iraq-Kurd Conflict: 2,588
Polish Election: 976
Sunday, October 21, 2007
The New Skype
The Early Life of Korba the Dread
A Pean to Vasily Grossman's Life and Fate
"Do You Believe in Sociobiology and Law?" - Chapter II
Saturday, October 20, 2007
Freedom Vel Non Sometimes Hangs on a Hair -- or on a Confession
Perhaps in the Dassey appeal we will witness a reprise of the Central Park Jogger Case?
It is also possible that some, many, or all of the confessions in the Central Park Jogger case were shaded by the confessors in an effort to deflect suspicion away from the individuals doing the confessing. I remain disturbed by the possibility that Reyes had a motive to make a false confession. And, as always, I insist that DNA evidence by itself is never conclusive evidence of guilt or innocence in any case (see, e.g., here (DNA Redux to the Fourth Power, September 8, 2002) and here). The probative force of DNA evidence depends on a myriad of surrounding circumstances and assumptions. In the Central Park Jogger case, for example, there are multiple scenarios that could explain how the defendants in the Central Park Jogger Case might have been guilty of attacking the Central Park jogger even though only the DNA of Reyes, who was not one of the people charged with and tried for attacking the jogger, was found on the body of the jogger-victim.
A couple of years after the attack I remember saying to my therapist that although I felt my assailant needed to be in prison, I was struggling with the knowledge that he'd left five children behind. She didn't understand this; like most people her attitude was, “You should want to kill the son of a bitch.”
... It happened in a beautiful place. I was out jogging when a man grabbed me from behind and pushed me into a wooded area. When I screamed, he choked my windpipe; when I fought back as he tried to rape me, he began beating and strangling me. Finally I lost consciousness. My last thoughts were: “I wish I'd kissed my son goodbye this morning” and “my daughter’s last vision of me will be of my dead, beaten body.”
Two good Samaritans found me, bleeding and naked in the sand dunes. ...
Later [the police] put nine photos by my bedside. I presumed the suspect was among them. Steve’s photo was in there and I selected it. ...
At the live line-up I looked at eight men and again picked out Steve Avery. I had selected his photo, and his image had become enmeshed with my memory of the real assailant. In my mind, Steve was the only person in those photos and in that line-up. As it turned out, my actual assailant was in neither.
...
After the assault I went into a deep depression. ... Then one day I read about a young woman, ten years younger than me, who had gone out jogging and been murdered. As I heard how her strangled body had been found in a swamp, I realized that I’d been given a second chance, whereas she had not.
At about the same time I heard a talk on Restorative Justice by a man called Dr. Mark Umbreit. He talked about how liberating it can be for victims to let go of their anger and hatred, and suddenly I felt a huge weight lift. At the next break I headed out to the state park where the assault had taken place. For the first time I wasn't afraid.
...
Then, in 2001, Steve’s attorney contacted The Wisconsin Innocence Project, who agreed to help with his case. A year later there was a motion to release additional biological materials for DNA testing. Two hairs were tested: one was identified as mine, and the other belonged to someone else – but that someone was not Steve Avery. In the CODIS database they got a direct hit with a man named Gregory Allen, who in 1995 had brutally raped a woman in Green Bay, Wisconsin, and was subsequently serving a 60-year sentence. Gregory Allen looks very much like Steve Avery.
When my attorney told me that the judge had reversed the verdict, I wanted the earth to swallow me. After all, I was partly responsible for identifying the wrong man, and no one can give Steve back those lost years. Not a day goes by when I don't think about the woman Gregory Allen raped in 1995, or wonder how many other women’s lives were drastically altered in those years when he was walking free.
I sunk into another deep depression and, feeling utterly powerless, wrote Steve a heartfelt apology letter. In it I stated that I felt like an offender and offered to meet with him. I'm so grateful that he agreed.
Steve is a very quiet man, but he gave me a hearty handshake and I told him how terribly sorry I was. After a bit, I asked if his parents would like to come in so I could apologize to them too. He said his mother would be OK but that his father was still kind of bitter. But in the end both of them agreed to meet me.
When it was time to conclude the meeting I stood up and went over to Steve and said, “Is it alright if I give you a hug?” He didn't even answer but just grabbed me in a big bear hug. Then I whispered, “Steve, I'm so sorry.” And he said, “Don't worry, Penny; it’s over.”
That was the most grace-filled thing that’s ever been said to me ...
Thursday, October 18, 2007
Still More Advance Papers on Visualization of Evidence and Inference in Legal Settings
17 October 2007
Bart Verheij, Argumentation support software: boxes-and-arrows and beyond, Law, Probability and Risk Advance Access published on October 17, 2007. doi:10.1093/lpr/mgm017
Neal Feigenson and Richard K. Sherwin, Thinking beyond the shown: implicit inferences in evidence and argument, Law, Probability and Risk Advance Access published on October 17, 2007. doi:10.1093/lpr/mgm016
John L. Pollock, Reasoning and probability, Law, Probability and Risk Advance Access published on October 17, 2007. doi:10.1093/lpr/mgm014
A Public Relations Disaster -- for Whom?
N.B. I have lived too long to believe all pieties, including the piety that plaintiffs' lawyers are only interested in doing good or that any and every recovery on behalf of wronged plaintiffs adds to justice. Sometimes it just 'tain't so; e.g., some lawyers (and plaintiffs) act mainly out of mercenary motives and sometimes the wrong people are made to pay for the wrongs and sins of others -- and sometimes the alleged wrongs that lead to settlements did not occur. My nostrils tell me that although sexual abuse of minors by Catholic clergy was (and presumably still is) a very real phenomenon, some archdioceses are settling for grand sums mainly to buy peace, and not because they believe that they are or should be morally or legally responsible for all or most of the sexual predations that are alleged in "survivors'" lawsuits. (I wonder: Does the southern California $600 million settlement foretell the demise of hierarchically-organized religious organizations in the U.S.A.?)
Tuesday, October 16, 2007
How Far Is the Farthest Star (not galaxy) that We Human Beings Have Seen?
I'm not sure of the answer to my question. But I can report a report that a supernova at a distance of five billion light years has been observed. See NASA's Astronomy Picture of the Day for October 16, 2007.Another way of expressing this distance: 186,282 x 60 x 60 x 24 x 365.25 x 5,000,000,000 = approximate number of miles; alternative: 5,878,625,373,183 x 5,000,000,000; alternative: very roughly (slight exaggeration): 30,000,000,000,000,000,000,000 miles
This supernova is so bright that it can be seen with a small telescope.
Is the structure of the brain more majestic than the structure of the universe? Or are these two structures equally majestic -- and, indeed, will knowledge of one eventually require and entail knowledge of the other -- or, indeed, is such conjoint knowledge of the macrocosmic and the microcosmic already at work?
Monday, October 15, 2007
Wikipedia and the Law of Evidence
In the case of the law of evidence, the experiment is almost a complete failure. See entry Evidence (law). The quality of the entry is ... abysmal.
Friday, October 12, 2007
More Advance Copies of Conference Papers on Visualization of Evidence & Inference
Advance copies of the below papers on visualization of evidence and inference are now available on the website of the Oxford journal Law, Probability and Risk. The hard copy special issue with 20+ papers and comments will be published this November or December.Douglas Walton, Visualization tools, argumentation schemes and expert opinion evidence in law, Advance Access published on October 10, 2007. doi:10.1093/lpr/mgm033
Tim van Gelder, The rationale for Rationale, Advance Access published on October 10, 2007. doi:10.1093/lpr/mgm032
Ron Loui, Comment on the Cardozo conference on graphic and visual representations of evidence and inference in legal settings, Advance Access published on October 10, 2007. doi:10.1093/lpr/mgm028
Thomas F. Gordon, Visualizing Carneades argument graphs, Advance Access published on October 10, 2007. doi:10.1093/lpr/mgm026
Dale A. Nance, The inferential arrow: a comment on interdisciplinary conversation, Advance Access published on September 25, 2007. doi:10.1093/lpr/mgm035
John D. Lowrance, Graphical manipulation of evidence in structured arguments, Advance Access published on September 25, 2007. doi:10.1093/lpr/mgm011
David A. Schum and Jon R. Morris, Assessing the competence and credibility of human sources of intelligence evidence: contributions from law and probability, Advance Access published on August 28, 2007. doi:10.1093/lpr/mgm025
Vern R. Walker, Visualizing the dynamics around the rule–evidence interface in legal reasoning, Advance Access published on August 19, 2007. doi:10.1093/lpr/mgm015
William Twining, Argumentation, stories and generalizations: a comment, Advance Access published on August 13, 2007. doi:10.1093/lpr/mgm008
Kevin D. Ashley, Comment on Lowrance's ‘Graphical manipulation of evidence in structured arguments’, Advance Access published on July 23, 2007. doi:10.1093/lpr/mgm012
Floris Bex, Susan van den Braak, Herre van Oostendorp, Henry Prakken, Bart Verheij, and Gerard Vreeswijk, Sense-making software for crime investigation: how to combine stories and arguments, Advance Access published on July 7, 2007. doi:10.1093/lpr/mgm007
Amanda B. Hepler, A. Philip Dawid, and Valentina Leucari, Object-oriented graphical representations of complex patterns of evidence, Advance Access originally published on May 24, 2007. This version published June 13, 2007. doi:10.1093/lpr/mgm005
Thursday, October 11, 2007
New blog: Open to persuasion
It appears that even the office of the prime minister of the UK is interested in strategies for mapping argument, in this instance public argument and debate about political, economic, and social issues.
David Price has software. He calls it Debatemapper. It is online software ("cloud software"?). It is free. Go to http://www.debatemapper.com to get the story (and the software) firsthand.
Your assignment, dear Reader: Discuss the links between Debatemapper and procedures such as neo-Wigmorean charting of inferential argument from and about evidence! (Thank you.)