Quote Originally Posted by warrior-librarian View Post
How come not all of the percentages add up to 100?
This is a Ti question - week spot with me.

To save myself a headache I'll stick to this:
Quote Originally Posted by ragnar
I did this very fast, not much thought or anything. Accuracy probably not very high.
Otherwise, one may go into lengthy ruminations about various formal logics and what not. Here's a place to start: Classical logic - Wikipedia, the free encyclopedia