Philosophy Quotes
Questions about meaning, existence, and truth from thinkers who spent their lives searching for answers.
43879 quotes
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"Ordinary language is often our best guide to metaphysics."Putnam, Hilary
"Philosophy is a conversation across centuries."Putnam, Hilary
"The naturalistic assumption does not solve philosophical problems."Putnam, Hilary
"Materialism is not the only scientifically respectable worldview."Putnam, Hilary
"The universe is not a closed causal system."Putnam, Hilary
"Responsibility is a pragmatic concept rooted in practice."Putnam, Hilary
"Ethics cannot be reduced to facts about human nature."Putnam, Hilary
"Moral disagreement reflects genuine indeterminacy, not mere opinion."Putnam, Hilary
"Democracy is not the perfect system, but it remains defensible."Putnam, Hilary
"Political philosophy must remain connected to actual human struggles."Putnam, Hilary
"Culture is not a veil separating us from reality."Putnam, Hilary
"The future of philosophy lies in engagement with science and culture."Putnam, Hilary
"Logic is the foundation upon which all rational thought is built."Church, Alonzo
"Every algorithm can be expressed in the lambda calculus; this reveals something profound about the nature of computation."Church, Alonzo
"Logic without intuition is empty; intuition without logic is blind."Church, Alonzo
"Computation is not merely a practical tool; it is a fundamental concept in nature."Church, Alonzo
"The lambda calculus is a universe unto itself, complete and self-contained."Church, Alonzo
"Logic and intuition need not be in conflict; they are complementary ways of knowing."Church, Alonzo
"The lambda calculus showed that different models of computation are fundamentally equivalent."Church, Alonzo
"Formal systems are games, but games with absolute rules and objective truth values."Church, Alonzo
"To work with formal systems is to engage in pure thought, uncontaminated by empirical accident."Church, Alonzo
"The study of recursion theory is ultimately a study of the nature of thought."Church, Alonzo
"Logic is the science of eternal truths; empiricism is the art of temporal facts."Church, Alonzo
"To work with formal systems is to participate in humanity's ongoing dialogue with truth itself."Church, Alonzo
"In the time of chimpanzees I was a monkey."Turing, Alan
"Only a man's own fundamental assumptions are more interesting to him than the supposed intellectual center of the universe."Turing, Alan
"Can a machine be conscious? No, because consciousness requires something that machines do not have."Turing, Alan
"A very large part of space-time near the observer's body is occupied by material of very little interest."Turing, Alan
"The original question, 'Can machines think?' I believe to be too meaningless to deserve discussion."Turing, Alan
"The degree to which we regard something as thinking is determined by our own capacity to understand it."Turing, Alan