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Logic takes care of itself; all we have to do is to look and see how it does it.
--
Journal entry (13 October 1914), also in Tractatus Logico-Philosophicus (§ 5.47)

 

Ludwig Wittgenstein

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All traditional logic habitually assumes that precise symbols are being employed. It is therefore not applicable to this terrestial life but only to an imagined celestial existence... logic takes us nearer to heaven than other studies.

 

Bertrand Russell

 

I had a great time, and I always took care of my body. That's the thing some players don't. For a goalie, there's no reason he can't play until he's 40 if he takes care of himself. The reflexes are still there.

 

Tony Esposito

 

Not knowing what one is looking for is pure agony. Too much analytical thinking, too much logic, too many meanings! Life has no logic, so why does there have to be logic to explain what it means? Also, what is logic? I think I may need to break away from analytical thinking; this is the cause of all my anxieties.

 

Gao Xingjian

 

So much of modern mathematical work is obviously on the border-line of logic, so much of modern logic is symbolic and formal, that the very close relationship of logic and mathematics has become obvious to every instructed student. The proof of their identity is, of course, a matter of detail: starting with premisses which would be universally admitted to belong to logic, and arriving by deduction at results which as obviously belong to mathematics, we find that there is no point at which a sharp line can be drawn, with logic to the left and mathematics to the right. If there are still those who do not admit the identity of logic and mathematics, we may challenge them to indicate at what point, in the successive definitions and deductions of Principia Mathematica, they consider that logic ends and mathematics begins. It will then be obvious that any answer must be quite arbitrary.

 

Bertrand Russell

 

It takes extraordinary wisdom and self-control to accept that many things have a logic we do not understand that is smarter than our own.

 

Nassim Nicholas Taleb