Related Clues:

• "For real?"
• Unquestionably
• 'For sure'
• "Says who?"
• Surely
• ''Says who?''
• "Definitely!"
• 'Says who?'
• 'That is correct'
• ''Do tell!''
• 'No doubt'
• "... is a friend ___"
• "Most assuredly!"
• Certainly, quite
• Really, truly