Related Clues:

• "It's pretty obvious, isn't it?"
• 'I am such a dope!'
• Head-slapping word
• ''How stupid of me!''
• 'It's so obvious!'
• "No __!"
• 'Obviously, Einstein!'
• 'Ya think?!'
• "As if I didn't know that!"
• 'Tell me about it!'
• ''That's obvious!''
• "No duh!"
• ''It's so obvious!''
• Forehead-slapper's syllable
• 'That's not news to me'