Possible Clues:

• Negative afterthought
• "Then again, I could be wrong"
• Hedger's last words
• Thompson Square "Are You Gonna Kiss Me ___"
• 'Believe it !'
• "To be, __ to be ..."
• '... but maybe I'm wrong'
• Ripley's closing words
• Second-guessing phrase
• "... never mind, then"