Related Clues:

• Fully convinced
• "Fine with me"
• 'Certainly!'
• 'Okey-doke'
• Verifiable
• "You bet!"
• "No problemo!"
• 'Works for me'
• Foolproof
• Doubt-free
• Mitchum competitor
• "Yeah, right"
• "Certainly!"
• "Why, certainly!"
• Sure rival