Ratio decidendi - Wikipedia
https://en.wikipedia.org/wiki/Ratio_decidendi
Ratio decidendi (Latin plural rationes decidendi) is a Latin phrase meaning "the reason" or "the rationale for the decision". The ratio decidendi is "the point in a case that determines the judgement" or "the principle that the case establishes". In other words, ratio decidendi is a legal rule derived from, and consistent with, those parts of legal reasoning within a judgment on which the outcome of the case depends.
DA: 17 PA: 21 MOZ Rank: 52