Consider helping today!
1911 Encyclopedia Britannica
(Lat. "from a stronger [reason]"), a term used of an argument which justifies a statement not itself specifically demonstrated by reference to a proved conclusion which includes it; thus, if A is proved less than B, and is known to be greater than C, it follows a fortiori that C is less than B without further proof. The argument is frequently based merely on a comparison of probabilities (cf. Matt. vi. 30), when it constitutes an appeal to common sense.
These files are public domain.
Chisholm, Hugh, General Editor. Entry for 'A Fortiori'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/a/a-fortiori.html. 1910.