Related Clues:

• 'Ya think?!'
• "As if I didn't know that!"
• ''That's obvious!''
• ''It's so obvious!''
• Forehead-slapper's syllable
• 'Any idiot knows that!'
• ''Boy, am I stupid!''
• "Silly me!"
• 'Well, that's obvious'
• 'Gee, ya think?'
• "What an idiot I am!"
• "Obviously!"
• ''Obviously, Einstein!''
• 'Oh, of course!'
• ''Well, isn't it obvious?!?''