You’ve come into possession of one vial of truth serum. Who would you give it to (with the person’s consent, of course) — and what questions would you ask?
Again here is a Pandora’s box of a question and one which shoots itself in the foot. If some is willing to answer with truth serum it is more then likely they don’t have anything to hide and thus it would negate and be a waste of the serum.
I think it might just useful to have it ask someone embarrassing questions…
Or the big question of all, the one which has never been answered:
“What is the name of Henry’s Cat?”