1. Word: Ratio decidendi
Definition: The reason behind or crux of a judicial decision.
Use of the Word: The ratio decidendi is "the point in a case that determines the judgment" or "the principle that the case establishes"
2. Word: In pari delicto
Definition: When both the parties are equally at fault.
Use of the Word: It is a legal term used to indicate that two persons or entities are equally at fault, whether the malfeasance in question is a crime or tort.