Tautology

W-What is it when you say the same thing twice? Um, uh-

Tautology? Or is that a contradiction?

Tautology.

Tautology.

No, that's...

No, that's...

Uh, search Kerman & Mayo, uh, Patreon, and you'll find us.

Uh, everything is very straightforward.

The proposition shows what it says, the tautology and the contradiction, that they say nothing.

The tautology has no truth conditions, for it is unconditionally true, and the contradiction is on no condition true.

Tautology and contradiction are without sense, like the point from which two arrows go out in opposite directions.

I know, e.g., nothing about the weather when I know that it rains or does not rain.

Four point four six one one.

Tautology and contradiction are, however, not nonsensical.

They are part of the symbolism in the same way that zero is part of the symbolism of arithmetic.

Four point four six two.