“… logical validity is not a guarantee of truth.”

“[ Fuzzy logic is ] a logic whose distinguishing features are (i) fuzzy truth-values expressed in linguistic terms, e. g., true, very true, more or less true, or somewhat true, false, nor very true and not very false, etc2.; (2) imprecise truth tables; and (3) rules of inference whose validity is relative to a context rather than exact.”

“It is not truth that is validated by a proof, but one’s understanding of it.”

“Seriousness is no more a guarantee of truth, insight, authenticity or probity, than humour is a guarantee of superficiality and stupidity.”

“Ethics must not remain a lovely abstraction; it must be concretized into valid truth. At this point ethics joins forces with religion because ethics too has ultimately no other recourse but to hypothesize the idea of God: not for the personal redemption of the moral individual but as a guarantee for the eventual realization of morality in this world.”

“Logic and truth are two very different things, but they often look the same to the mind that’s performing the logic.”

“Logic chases truth up the tree of grammar.”

“Briefly, you can only find truth with logic if you have already found truth without it.”

“There is no such thing as truth. The only thing that is actually there is your "logically" ascertained premise, which you call "truth."”

“The secular state is the guarantee of religious pluralism. This apparent paradox, again, is the simplest and most elegant of political truths.”