…suppose you were being questioned by the Truth Demon – a super-powerful being who knows the truth on every topic, and will punish you horribly if you give a wrong answer or fail to answer at all. If you continue to assert a claim when the Truth Demon asks you if it is true, then you do really believe it, really think it is true. But if you give a different answer when under threat of torture by the all-knowing demon, then you don’t really believe the claim.
—What do you really believe? Take the Truth-Demon Test, Keith Frankish / Aeon
Manderson's Bubble 