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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"Mathematics is not discovered but invented within conceptual schemes."
Putnam, Hilary
P
"Realism about mathematics requires platonism we cannot justify."
Putnam, Hilary
P
"Numbers are nothing but useful fictions for science."
Putnam, Hilary
P
"Semantics is holistic; no word has meaning in isolation."
Putnam, Hilary
P
"Coherence in belief justifies, not correspondence to facts."
Putnam, Hilary
P
"Epistemic justification is always relative to a conceptual system."
Putnam, Hilary
P
"Knowledge requires both belief and reliability, not correspondence."
Putnam, Hilary
T
"Language is the instrument through which we clarify our thoughts and communicate the structures of reality."
Tarski, Alfred
T
"The distinction between object language and metalanguage is crucial for avoiding paradox and confusion."
Tarski, Alfred
T
"The work of the logician is to make explicit what the ordinary speaker leaves implicit."
Tarski, Alfred
T
"We cannot speak truly about what we have not first carefully defined."
Tarski, Alfred
T
"The universal principles of logic transcend culture and history; they are the common heritage of humanity."
Tarski, Alfred
T
"We are all, in a sense, linguists; we all use language daily without understanding its structure."
Tarski, Alfred
T
"The greatest enemy of understanding is the belief that we already understand."
Tarski, Alfred
T
"The distinction between use and mention is subtle but essential for any coherent philosophy of language."
Tarski, Alfred
T
"The logical form of a statement is often hidden beneath its grammatical form."
Tarski, Alfred
T
"The boundaries of our language are the boundaries of our world, but analysis can extend these boundaries."
Tarski, Alfred
T
"Mathematics is a mixture of reasoning and intuition."
Turing, Alan
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"To understand a program you must become both the machine and the programmer."
Turing, Alan
T
"We cannot, at present, keep completely accurate track of the state of the machine at all times."
Turing, Alan
T
"The contradictions we encounter in our attempts to formulate the rules of thought are of great interest."
Turing, Alan
T
"A person supplied with paper and pencil and rubber, and subject to strict discipline, is in effect a universal computing machine."
Turing, Alan
T
"The degree to which a machine can simulate human thought is limited primarily by the breadth of the machine's programming."
Turing, Alan
T
"The universal computing machine is capable of computing any sequence that can be computed."
Turing, Alan
C
"Mathematics reveals structures that seem to precede and transcend physical reality."
Chalmers, David
C
"Consciousness might bridge the apparent divide between science and the humanities."
Chalmers, David
C
"The hard problem teaches us that not all important questions yield to the standard scientific method."
Chalmers, David
G
"The human mind is incapable of formulating certain concepts which are essential to a correct understanding of the world."
Gödel, Kurt
G
"The incompleteness theorems show us the limits of formal systems, but not the limits of human understanding."
Gödel, Kurt
G
"To abandon logic is to abandon the only tool we have for understanding anything."
Gödel, Kurt