A(n) is a presupposition from which a conclusion is drawn.

Premise

Explanation:

A premise is a presupposition from which a conclusion is drawn. In other words, this is the statement that an argument claims will justify a conclusion. Therefore, a premise is an assumption that something is true and that functions as an initial building block for an argument. A basic argument includes two premises, along with a proposition that serves as a conclusion.

better now, by post malone