Related Clues:

• "Beats me"
• [   ]
• 'Your guess is as good as mine'
• "It's hard to tell"
• "No one knows"
• 'It's hard to tell'
• 'It's anyone's guess'
• 'Who knows'
• "Who knows"
• Question suggesting 'Beats me!'
• 'No one knows'
• "There's no way to know, is there?"