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Sir Arthur Conan Doyle (1859-1930)

Detection is, or ought to be, an exact science and should be treated in the same cold and unemotional manner. You have attempted to tinge it with romanticism, which produces much the same effect as if you worked a love story or an elopement into the fifth proposition of Euclid.

The Sign of Four

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Mathematical Quotations

Our library of quotations is organized alphabetically by surname of the author.

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Caballero, James

I advise my students to listen carefully the moment they decide to take no more mathematics courses. They might be able to hear the sound of closing doors.

Georg Cantor

I place myself in a certain opposition to widespread views on the nature of the mathematical infinite.

Cardano, Girolamo (1501 - 1576)

To throw in a fair game at Hazards only three-spots, when something great is at stake, or some business is the hazard, is a natural occurrence and deserves to be so deemed; and even when they come up the same way for a second time if the throw be repeated. If the third and fourth plays are the same, surely there is occasion for suspicion on the part of a prudent man.

Carlyle, Thomas (1795-1881)

A witty statesman said, you might prove anything by figures.

Carlyle, Thomas (1795 - 1881)

It is a mathematical fact that the casting of this pebble from my hand alters the centre of gravity of the universe.

Carmichael, R. D.

A thing is obvious mathematically after you see it.

Carroll, Lewis

"When I use a word," Humpty Dumpty said, in a rather scornful tone, "it means just what I choose it to mean - neither more nor less."
"The question is," said Alice, "whether you can make words mean so many different things."
"The question is," said Humpty Dumpty, "which is to be master - that's all."

Carroll, Lewis

"It's very good jam," said the Queen.
"Well, I don't want any to-day, at any rate."
"You couldn't have it if you did want it," the Queen said. "The rule is jam tomorrow and jam yesterday but never jam to-day."
"It must come sometimes to 'jam to-day,'" Alice objected.
"No it can't," said the Queen. "It's jam every other day; to-day isn't any other day, you know."
"I don't understand you," said Alice. "It's dreadfully confusing."

Carroll, Lewis

"Then you should say what you mean," the March Hare went on.
"I do," Alice hastily replied; "at least I mean what I say, that's the same thing, you know."
"Not the same thing a bit!" said the Hatter. "Why, you might just as well say that 'I see what I eat' is the same thing as 'I eat what I see!'"

Carroll, Lewis

Alice laughed: "There's no use trying," she said; "one can't believe impossible things."
"I daresay you haven't had much practice," said the Queen. "When I was younger, I always did it for half an hour a day. Why, sometimes I've believed as many as six impossible things before breakfast."

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