Template:Individual-TLP-paragraph-en-4.0621

4.0621 That, however, the signs “p” and “~p” can say the same thing is important, for it shows that the sign “~” corresponds to nothing in reality.

That negation occurs in a proposition, is no characteristic of its sense (~~p = p).

The propositions “p” and “~p” have opposite senses, but to them corresponds one and the same reality.