אֵין סָפֵק מוֹצִיא מִדַּי וַדַּאי

ביטוי (אנגלית)

A doubt does not remove a certainty

הגדרה (אנגלית)

A doubt or any assumption cannot replace something certain that is not in question.

(Does a doubt remove a certainty? But was it not taught: There was an incident with the maidservant of an olive presser in Rimmon, who miscarried into a pit, and a priest looked in to see whether it was male or female. The case came before the sages and they declared him pure, since a weasel and mongoose are commonly found there. Rashi: There is a doubt for leniency, but a certainty for prohibition. A doubt does not remove a certainty, for at first it was assumed forbidden. — Niddah 15b)