Related Clues:

• ''How stupid of me!''
• 'It's so obvious!'
• "No __!"
• ''__ any wonder?''
• 'Obviously, Einstein!'
• ''Where ___ written ...''
• "Oh, really?"
• 'What -- now?'
• 'Ya think?!'
• "As if I didn't know that!"
• ''That's obvious!''
• ''It's so obvious!''
• Forehead-slapper's syllable
• ''. . . or __ just me?''
• "But --- art?"