premise

nouns

a statement that is assumed to be true and from which a conclusion can be drawn
"on the assumption that he has been injured we can infer that he will not to play"

verbs

set forth beforehand, often as an explanation
"He premised these remarks so that his readers might understand"
is a type of (narrower)
state
"set forth one's reasons"
furnish with a preface or introduction
"She always precedes her lectures with a joke"; "He prefaced his lecture with a critical remark about the institution"
take something as preexisting and given