Quotes About Logic

Philosophy is the study of the nature of existence, of knowledge, and of values.

Reality, declares Hegel, is inherently contradictory;

Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.

Those who, in debate, appeal to their qualifications, argue from memory, not from understanding.

Where the spirit does not work with the hand, there is no art. Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.

E veramente accade che sempre dove manca la ragione suppliscono le grida[...]

There is nothing in all nature without its reason, he wrote. If you know the reason, you do not need the experience.

He who in reasoning cites authority is making use of his memory rather than of his intellect.

Oricine îÅŸi susÈ›ine un argument prin apelarea la o autoritate nu îÅŸi foloseÅŸte inteligenÈ›a; el îÅŸi utilizeaz? doar memoria.

There are three classes of people: those who see. Those who see when they are shown. Those who do not see. Time stays long enough for anyone who will use it. Poor is the pupil who does not surpass his master Simplicity is the ultimate sophistication. Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity

What remains is the impression of a clear rhythm, a logical & absolutely sure articulation of the picture plane.

No Ghost of any common sense begins a conversation

It would be so nice if something made sense for a change.

Alice didn't think that proved it at all; however, she went on: 'And how do you know that you're mad?' 'To begin with,' said the Cat, 'a dog's not mad. You grant that?' 'I suppose so,' said Alice. 'Well then,' the Cat went on, 'you see, a dog growls when it's angry, and wags its tail when it's pleased. Now I growl when I'm pleased, and wag my tail when I'm angry. Therefore I'm mad.' 'I call it purring, not growling,' said Alice.

Reeling and Writhing of course, to begin with,' the Mock Turtle replied, 'and the different branches of arithmetic-ambition, distraction, uglification, and derision.

The Red Queen shook her head. You may call it 'nonsense' if you like, she said, but I've heard nonsense, compared with which that would be as sensible as a dictionary!

You might just as well say," added the Dormouse, who seemed to be talking in its sleep, "that 'I breathe when I sleep' is the same thing as 'I sleep when I breathe'!

To begin with, said the Cat, a dog's not mad. You grant that? I suppose so, said Alice Well, then, the Cat went on, you see a dog growls when it's angry, and wags its tail when it's pleased. Now I growl when I'm pleased, and wag my tail when I'm angry. Therefore I'm mad. I call it purring, not growling, said Alice. Call it what you like, said the Cat.

You might just as well say," added the March Hare, "that 'I like what I get' is the same thing as 'I get what I like'!

Not the same thing a bit!" said the Hatter. "You might just as well say that 'I see what I eat' is the same thing as 'I eat what I see'!

If it was so, it might be; and if it were so, it would be; but as it isn't, it ain't. That's logic.

I know what you're thinking about," said Tweedle-dum, "But it ain't so, nohow." "Contrariwise," continued Tweedledee, "if it was so, it might be; and if it were so, it would be; but as it isn't, it ain't. That's logic.

Si no tiene sentido", dijo el Rey, "eso nos salva de un montón de problemas, sabes, porque no hace falta que le busquemos uno.

She can't do Subtraction,' said the White Queen. 'Can you do Division? Divide a loaf by a knife—what's the answer to that?