What is represented by "Q.ED." in legal terminology?

In legal terminology, "Q.ED." stands for "quod erat demonstrandum," which is a Latin phrase meaning "which was to be demonstrated." This term is often used at the end of mathematical proofs and philosophical arguments to signify that the proof or argument has been completed successfully. It indicates that the evidence or reasoning provided has accomplished the objective it set out to prove, thereby reinforcing the conclusion drawn.

Understanding this concept is essential, as it highlights the importance of clearly demonstrating conclusions in legal writing and argumentation, ensuring that all claims are substantiated with adequate proof. It reflects the rigorous standards of evidence and reasoning that underpin legal proceedings, making it a foundational aspect of legal practice.