An Affidavit (n.) is the same story you already told, retyped by somebody who charges by the page.
Anecdotal evidence (n.) is like judging the weather by whichever window you happen to be sitting at.
Anecdotal evidence (n.) beats a spreadsheet every time someone cries while telling it.
Anecdotal evidence (n.) is a sample size of one uncle.
Anecdotal evidence (n.) is what people are asking for when they say they want a recommendation.
Circumstantial evidence (n.) is never permitted in mathematics: we see the far bank but build no bridge.
Circumstantial evidence (n.) is sometimes very strong, like when finding a trout in the milk.
Circumstantial evidence (n.) is by no means synonymous with weak evidence. Forensic evidence such as finger prints, DNA, and gunshot residue evidence are circumstantial.
Circumstantial evidence (n.) is an elevated form of coincidence.
A Clue (n.) is like a footprint, which tells you someone walked and not where they were going.
A Clue (n.) is the detail that only becomes important after you needed it.
A Clue (n.) is invisible until the answer is known, at which point it was always obvious.
A Clue (n.) is a detail promoted after the fact.