A Quote by Mark Kac

A proof is that which convinces a reasonable man; a rigorous proof is that which convinces an unreasonable man. — © Mark Kac
A proof is that which convinces a reasonable man; a rigorous proof is that which convinces an unreasonable man.
My proof convinces the ignorant, and the wise man's proof convinces me. But he whose reasoning falls between wisdom and ignorance, I neither can convince him, nor can he convince me.
A proof is a proof. What kind of a proof? It's a proof. A proof is a proof. And when you have a good proof, it's because it's proven.
One can never really give a proof of the reality of anything; reality is not something open to proof, it is something established. It is established just because proof is not enough. It is this characteristic of language, at once indispensable and inadequate, which shows the reality of the external world. Most people hardly ever realize this, because it is rare that the very same man thinks and puts his thought into action.
In science, the credit goes to the man who convinces the world, not to the man to whom the idea first occurs.
But in science the credit goes to the man who convinces the world, not to the man to whom the idea first occurs. Not the man who finds a grain of new and precious quality but to him who sows it, reaps it, grinds it and feeds the world on it.
A reasonable man adjusts himself to the world. An unreasonable man expects the world to adjust itself to him. Therefore all progress is made by unreasonable people.
We have here a proof that there is in the atom a fundamental quantity, which increases by regular steps as one passes from one element to the next. This quantity can only be the charge on the central positive nucleus, of the existence of which we already have definite proof.
Well, did he do it?" She always asked the irrelevant question. It didn't matter in terms of the strategy of the case whether the defendant "did it" or not. What mattered was the evidence against him -- the proof -- and if and how it could be neutralized. My job was to bury the proof, to color the proof a shade of gray. Gray was the color of reasonable doubt.
But facts always convince, and another man's opinion rarely convinces.
I would not read the proof of one of my books for any fair & reasonable sum whatever, if I could get out of it. The proof-reading on the P & Pauper cost me the last rags of my religion.
The perfectly natural thing to do with an unreadable book is to give it away; and the publication, for more than a quarter of a century, of volumes which fulfilled this one purpose and no other is a pleasant proof, if proof were needed, of the business principles which underlay the enlightened activity of publishers.
For those who want some proof that physicists are human, the proof is in the idiocy of all the different units which they use for measuring energy.
He had a certain air of being a handsome man-which he was not; and a certain air of being a well-bred man-which he was not. It was mere swagger and challenge; but in this particular, as in many others, blustering assertion goes for proof, half over the world.
The man who is anybody and who does anything is surely going to be criticized, vilified, and misunderstood. This is a part of the penalty for greatness, and every great man understands it; and understands, too, that it is no proof of greatness. The final proof of greatness lies in being able to endure contumely without resentment.
In science, the credit goes to the man who convinces the world, not to whom the idea first occurs.
The reasonable man will adjust to the demands of his environment. The unreasonable man expects his environment to adjust to his own needs. Therefore, all progress depends upon the unreasonable man.
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