[FOM] Terminology

[Joao Marcos]

> The standard English word for sentences (or propositions)
> that are always true is 'tautology'.  Is there a word for
> sentences that are always false? (No, I don't want to hear
> 'contradiction', for that is defined as a sentence of the
> form 'p and not-p', or something logically equivalent to it,
> and therefore is a syntactical notion.)

A common word for the dual of a tautology ---viz. a sentence that is
false by virtue of its logical structure--- is "antilogy".  (You can
find it registered in Merriam-Webster, for instance.)

Best,
Joao Marcos

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