Contrary to known or agreed facts; untrue.
Of or in comparison to a hypothetical state of the world.
A conditional statement in which the conditional clause is false.
A claim, hypothesis, or other belief that is contrary to the facts.
A hypothetical state of the world, used to assess the impact of an action.
Unclear or unreliable.
Experiencing or showing doubt, sceptical.
Subject to, or causing doubt.
Improbable or unlikely.
Suspicious, or of dubious character.
Undecided or of uncertain outcome.
A doubtful person or thing.