Related Clues:

• Questionable
• Hard to believe
• Uncertain
• Open to question
• Unsure
• Improbable
• Unlikely
• Not certain
• Dubious
• Unlikely, questionable
• Unsettled in mind or opinion
• Open to question, uncertain
• Flout Dub, being undecided
• Unlikely description of Thomas
• Certain people cannot be so described