What new words have you learned recently?

[SZbNAhL]

Tautology-Two words that mean the same thing put beside each other consecutively.

That’s a pleonasm actually. A tautology is a statement that bears no new information or a logical construct that is always true regardless of the truth of its hypothesis.

Example: ‘All red ants are red’, every single math theorem ever, ‘my older brother was born before I was’, etc.

I'd call that a truism. I'd say tautology is a repetition of information, either from acronym confusion (e.g. PIN number) or describing nouns with adjectives already included in their definitions e.g. organic aldehyde, French Parisian, microscopic atom.

As for new words, I learned "crepuscular" today, meaning "of or related to twilight"*. I therefore move that Stephanie Meyer fans henceforth be referred to as "the crepuscular collective".

*Here was the context, if anyone's interested.