Why is the legal shorthand symbol for defendant a delta symbol?

The legal shorthand symbol for defendant is represented by the delta symbol (Δ) due to its Greek letter origins. Delta is often used in various scientific and mathematical contexts to denote change or difference, which metaphorically aligns with the role of the defendant in a legal case, as they represent a counterpoint or challenge to the claims made by the plaintiff. This shorthand aids in streamlining legal writing and note-taking, making it easier for legal professionals to communicate complex ideas quickly.