Comment by johnwcowan on Belief in Belief · 2011-07-26T23:28:57.728Z · LW · GW

Knowledge involves more than belief. You know p if all of the following are true:

1) You believe p. 2) p is true. 3) If p were not true, you wouldn't believe it (justified true belief) 4) If p were true, you would believe it (Gettier belief)

And most beliefs, such as the belief that my keys are in my left pocket, are trivial and true, as well as being based on data.