The reason
The legal maxim is of latin origin which means “the reason” or “motivation” behind the decision ruled out by the judge. It refers strictly to the facts of the case, things which cannot be debated. Unlike Obiter Dicta, these statements are actually binding on the case to its facts. All the principles relied on by the court are a part of ratio decidendi in order to prove the reasoning behind coming to the decision in the case. It comprises all the legal points made by the parties in the case.
The genuine violation of the fundamental rights of A by B was the “ratio decidendi” behind holding B guilty.
Caledonian Railway Co. v. Walkers Trustees, ((1882) 7 App Cas 259:46 LT 826 (HL))
The hon’ble court held that, The ratio decidendi is the underlying principle,namely, the general reasons or the general grounds upon which the decision is based on the test or abstract from the specific peculiarities of the particular case which gives rise to the decision.