Related Clues:

• 'No kidding?'
• Doubter's words
• Start of a speculative comment
• "Yeah, sure, sure"
• ''Fat chance!''
• "Oh, suuure"
• "Oh, really?"
• "Not likely!"
• 'Ain't gonna happen!'
• '-- I didn't know'
• Doubter's reply
• Skeptic's challenge
• ''Oh, you wish!''
• “Dream on!”
• Skeptical reply