The nature of knowledge
Knowledge is truth about the world.
Truth is:
What corresponds to reality (the correspondence theory), or
What coheres with our other knowledge (the coherence theory), or
What adds to our understanding (the pragmatic theory).
Most fundamental: correspondence theory (necessary and sufficient).
Less fundamental: coherence and pragmatic theories (necessary but not sufficient).
Knowledge is not belief.
Knowledge is certain (probability of 100%).
Belief is uncertain (probability <100%).
Fanatics derive strongest beliefs from lowest probabilities.
The fringe groups in the JFK community are fanatics (e.g., the publicity just before this conference).