Related Clues:

• 'Dunno'
• "Beats me"
• "Who knows?"
• [   ]
• 'No clue'
• Comment made with a shrug
• ''Beats me!''
• 'I haven't the foggiest'
• "Beats me!"
• 'No idea'
• 'I haven't a clue'
• 'Who knows?!'
• ''I have no idea!''
• ''How should I know?''
• "Haven't a clue!"