Circular logic is self-validating. Therefore it is correct.
— Anonymous

So, you have been sitting here thinking illogically about logical possibilities or logically about illogical possibilities. No wonder you are cranky.
— Delenn, Babylon 5

Your logic does not resemble our Earth logic.
— Buffy, Buffy the Vampire Slayer

"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!"
— Lewis Carroll, Through the Looking Glass

Man is not logical and his intellectual history is a record of mental reserves and compromises. He hangs on to what he can in his old beliefs even when he is compelled to surrender their logical basis.
— John Dewey

Logic doesn't apply to the real world.
— Marvin Minsky

It's been a fascinating discussion, because ... I feel like we don't connect, like, on — it's, like ... it's weird. Because ... I like you ... but I don't understand how your brain works.

— Jon Stewart, wrapping up the Betsy McCaughey interview.

"In the arena of logic, I fight unarmed!"

Red Mage: Most plans are critically flawed by their own logic. A failure at any step will ruin everything. That's just basic cause and effect. It's easy for a good plan to fall apart. Therefore, a plan that has no attachment to logic can not be stopped. The success or failure of any step will have no impact on the macro level.

Black Mage: That's so stupid I can't even see straight any more.

Red Mage: Now imagine what'll happen when physics tries to figure it out!

Ranger: Only people who aren't us have disappeared, Rogue. Should this pattern continue, we ought to be fine.

Rogue: Why does that make more sense than I think it should?

Ranger: Don't question it!

Rogue: Right. Okay. I have to believe that this will work out in the end.

Sarda: That's a shame.

Red Mage: We need to use your heart.

Black Mage: So do I! It moves my blood around.

Red Mage: Not if we kill you!

Black Mage: That's distressingly logical.

Thief: Red Mage, this the worst plan yet in your lifetime filled with nothing but the worst plans.

Red Mage: It will work, I guarantee it!

Black Mage: It starts at the impossible before moving on to the even more impossible.

Red Mage: Precisely!

Red Mage: I'll need more proof than a logical fallacy.

Jeff: In a recent poll, it was found that 100% of Jeffs were very handsome and thought Black Mage survived. Why don't you. Is it because you're ugly?

Red Mage: That's enough logical fallacies to convince me. Black Mage is fine.