Related Clues:

• 'I have no idea!'
• Expression of bafflement
• -
• "Who knows?"
• [   ]
• 'No clue'
• Comment made with a shrug
• 'I haven't the foggiest'
• 'No idea'
• 'Who knows?!'
• ''How should I know?''
• 'Hell if I know'
• Unhelpful answer
• 'How should I know?'
• "No idea"