different between presupposition vs presuppositional

English

From Middle French présupposition, from Latin praesuppositio, from the past participle stem of praesupp?nere (“to presuppose”).

presupposition (countable and uncountable, plural presuppositions)

An assumption made beforehand; a preliminary conjecture or speculation.
- 2010, Guy Deutscher, Through the Language Glass, Arrow 2011, p. 40:
  He made one cardinal error in his presuppositions about the relation between language and perception, but in this he was far from alone.
The act of presupposing.
(linguistics) An assumption or belief implicit in an utterance or other use of language.

presupposition +? -al.

presuppositional (not comparable)

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