Argue the point you can prove, not the one you wish were true. Your weakest claim drags the strong ones down.

Cases get judged by their weakest link. Say one thing that can be shown to be shaky and everything else becomes suspect, including the parts that were solid. The temptation runs the other way, because piling on reasons feels stronger. In practice two points you can back up beat five where one is a guess.

Write your reasons out next time you have to argue something, and cross off anything you could not support if challenged. Lead with the strongest survivor. If what is left looks thin, that is useful to know before somebody else finds it.