Question

If two points are given, then exactly one line can be drawn through those two points.

Answer 1

Yes indeed. That is so. Your statement is a fact. It virtually pulsates with veracity and truthiness. You can take it to the bank and hang your hat on it. Truer words are seldom written or spoken.

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Answer 2

a postulate

Explanation:

a postulate which states that through any two points, there is exactly one line