Pattern Recognition, Bayesianism, Fuzzy Logic, Fingerprints etc.

Question: What if anything does the use of pattern recognition to match, e.g., fingerprint specimens have to say about the meaning or interpretation of classifications such as "reasonable and customary care" in legal rules or standards?

To get a flavor of some of the many problems involved in pattern recognition and to see discussion of a variety of possible methods to attack those problems, see (most of us are better-advised to skim) Sonka, [Notes and Slides for] Pattern Recognition Class