deutschdictionary
noun
(SOMETHING ACCEPTED AS TRUE WITHOUT PROOF)
The assumption was unfounded. - Die Vermutung war unbegründet.
(AN ESTIMATION MADE WITHOUT SUFFICIENT INFORMATION)
My guess was a shot in the dark. - Meine Vermutung war ein Schuss ins Blaue.
(AN IDEA OR THEORY BASED ON LIMITED EVIDENCE)
The supposition turned out to be false. - Die Vermutung stellte sich als falsch heraus.