the.com/uncertain
The honest answer dressed up so it doesn't have to say I don't know.
means Not known, not decided, or not reliable — lacking the confidence to commit either way.
from From Latin certus (settled, sure) with negating prefix un-, arriving via Old French in the 14th century — literally not-sifted, not-sorted-out.
Physics fameHeisenberg made uncertainty a law, not a flaw.
Decision mathWhole fields exist just to price the unknown.
Hedge cousinLives next door to maybe, perhaps, and probably.