Knowledge Quotes

From ancient scholars to modern scientists, these quotes explore what it means to learn and to know.

31147 quotes

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"A statement is meaningful only if it can be verified or confirmed by experience."
Carnap, Rudolf
C
"We must distinguish carefully between what can be known and what merely seems plausible."
Carnap, Rudolf
C
"The pursuit of knowledge demands intellectual honesty and skepticism."
Carnap, Rudolf
C
"The meaningfulness of a statement depends upon our ability to determine its truth value."
Carnap, Rudolf
C
"The empiricist rejects all knowledge claims that cannot be empirically grounded."
Carnap, Rudolf
C
"We are limited not by reality but by the adequacy of our concepts."
Carnap, Rudolf
C
"We should be skeptical of claims that resist empirical investigation."
Carnap, Rudolf
C
"We must distinguish between what we know and what we merely believe."
Carnap, Rudolf
C
"We should be cautious about claims that transcend possible experience."
Carnap, Rudolf
P
"The growth of knowledge is the discovery of our ignorance."
Popper, Karl
P
"Human knowledge is capable of increasing indefinitely."
Popper, Karl
P
"The growth of our knowledge is entirely in the realm of the possible."
Popper, Karl
A
"A proposition is a tautology if it is analytic and true."
Ayer, Alfred Jules
A
"Empiricism remains the only defensible approach to knowledge."
Ayer, Alfred Jules
A
"Necessity is a feature of language, not of the world."
Ayer, Alfred Jules
A
"Universal statements cannot be conclusively verified by experience."
Ayer, Alfred Jules
A
"Definition reveals conceptual connections, not hidden essences."
Ayer, Alfred Jules
A
"Induction is justified by pragmatic necessity, not logical proof."
Ayer, Alfred Jules
A
"Conventionalism explains the necessity found in logic and mathematics."
Ayer, Alfred Jules
A
"We achieve knowledge through logical analysis and empirical observation."
Ayer, Alfred Jules
A
"Logical truths are conventions expressing structural relationships."
Ayer, Alfred Jules
A
"Experience provides the only foundation for empirical knowledge."
Ayer, Alfred Jules
A
"The paradoxes of self-reference dissolve with careful analysis."
Ayer, Alfred Jules
A
"Skepticism follows naturally from taking empiricism seriously."
Ayer, Alfred Jules
A
"We justify beliefs through coherence within empirical systems."
Ayer, Alfred Jules
A
"The quest for first principles is ultimately self-defeating."
Ayer, Alfred Jules
A
"We construct our understanding through empirical investigation."
Ayer, Alfred Jules
A
"Inductive reasoning provides practical guidance, not certainty."
Ayer, Alfred Jules
A
"Experience teaches us that induction works, however paradoxically."
Ayer, Alfred Jules
A
"Logical necessity is a feature of language systems."
Ayer, Alfred Jules