Related Clues:

• Retort to "You are not!"
• Schoolyard argument retort
• 'That ___ true!'
• Defensive response to a doubter
• Response to a doubting Thomas
• "This __ silly!"
• Playground defense
• Comeback to 'You are not!'
• Reply to 'You're not even smart enough to be in fourth grade'
• 'As -- often the case ...'
• "You are not!" retort
• '-- solemnly swear ...'
• Emphatic assertion
• Retort to 'Am not!'
• Recess rebuttal, perhaps