“Those who claim to discover everything but produce no proofs of the same may be confuted as having actually pretended to discover the impossible.”
On Spirals (225 B.C.)
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Archimedes 20
Greek mathematician, physicist, engineer, inventor, and ast… -287–-212 BCRelated quotes

XVII, 11
The Kitáb-I-Asmá
Context: Should a person lay claim to a cause and produce his proofs, then those who seek to repudiate him are required to produce proofs like unto his. If they succeed in doing so, his words will prove vain and they will prevail; otherwise neither his words will cease nor the proofs he hath set forth will become void. I admonish you, O ye who are invested with the Bayán, if ye would fain assert your ascendancy, confront not any soul unless ye give proofs similar to that which he hath adduced; for Truth shall be firmly established, while aught else besides it is sure to perish.

L24
Aphorisms (1765-1799), Notebook L (1793-1796)

“I have discovered a truly remarkable proof of this theorem which this margin is too small to contain.”
Cuius rei demonstrationem mirabilem sane detexi hanc marginis exiguitas non caperet.
Note written on the margins of his copy of Claude-Gaspar Bachet's translation of the famous Arithmetica of Diophantus, this was taken as an indication of what became known as Fermat's last theorem, a correct proof for which would be found only 357 years later; as quoted in Number Theory in Science and Communication (1997) by Manfred Robert Schroeder

“Feminism’s claim that it discovered rape is simply false.”
Source: Sex, Art and American Culture : New Essays (1992), The Rape Debate, Continued, p. 72

“Civilization is a hopeless race to discover remedies for the evils it produces.”

“Kindness, I’ve discovered, is everything in life.”