Strongly Recommended for Students of Fact Investigation

You simply must buy the second edition of Andrew Palmer's Proof, How to analyse evidence in preparation for trial (Lawbook Co., Thompson Reuters Australia, 2d ed., 2010).

The book is unique, it's right on the mark, it's relatively inexpensive, and it uses Timothy van Gelder's brilliant scheme for visualizing argument about almost anything -- including, it is now evident, argument from and about evidence.

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The dynamic evidence page

It's here: the law of evidence on Spindle Law. See also this post and this post.