I think agreement is over-rated as a criteria of truth. The
spaces inbetween conflict are where the little ponds of truth
lie.
cognitively, belief comes from a push from the amygdala. It is
the pimary drive of reason. Reasoning *can* back-influence
belief, but at a slower, thinner, more fragile pace. Takes
training.
At the same time, we're more than our brains. Plus, I see most
things as fundamentally synonymous in some fashion. So, I can
say "yes", "no", "I don't know", depending on the screening I
put over the frame and how the light is hitting the object in
question.