clue 和 evidence 和 proof 的差別在哪裡？如果不好說明，請提供一些例句。

A clue is a piece of evidence or information used in a detection of a crime example, police officers are still looking for clues.
Evidence, is the available body of facts or information indicating whether a belief or proposition is true or valid.
example, There is plenty of evidence to show that they were in the area on the day of question.
Proof, establishes facts of the truth and statement.
example, you will be asked to provide proof of the incident.