Related Clues:

• Doubter's comment
• Sarcastic ''Sure!''
• "Doubtful"
• ''Ha!''
• 'That doesn't surprise me!'
• '... but possibly untrue'
• 'Uh-huh, yeah, sure'
• Remark after an awkward silence
• Skeptic's rejoinder
• Expression of doubt
• Exclamation of disbelief
• Scoffing comment
• 'To be -- ...'
• "... but then, I could be wrong"
• ''That's not gonna happen''