presupposition

noun3

1. •
   An assumption made beforehand; a preliminary conjecture or speculation.

   • He made one cardinal error in his presuppositions about the relation between language and perception, but in this he was far from alone. — 2010
2. •
   The act of presupposing.
3. •
   An assumption or belief implicit in an utterance or other use of language.

   • For instance: a verb might convey someone's evaluation of it as a presupposition. To say ‘they deprived him of a visit to his parents’ presupposes that he wanted to visit (vs. ‘spare him a visit...’). — 1971