the.com/tautology

a sentence so true it forgot to say anything at all

means A statement that says the same thing twice or is true by its very structure, conveying no real information — like "a free gift" or "it is what it is."

from From Greek 'tauto-' (the same), a contraction of 'to auto' (the same thing), plus '-logia' (saying, speech). So at its root it literally means "saying the same" — fittingly, the word performs its own definition. It entered English via Latin in the 16th century, first as a term of logic and rhetoric for redundant repetition.

logic
always true, no matter the inputs
law of identity
A is A, charging you nothing
rhetoric
free gift and ATM machine both repeat themselves
empty proof
valid yet useless, like a verified blank check
for instance

bachelors are unmarried men — classic example in logic: the predicate adds no new information to the subject

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