Related Clues:

• Irrefutable
• 'Agreed!'
• Proven
• 'No problem!'
• 'Of course!'
• 'Let's do it!'
• Nope's counterpart
• Never-failing
• 'No sweat'
• Western agreement?
• 'Oh, what the hell'
• Convinced
• 'Sure thing!'
• 'You bet'
• Informal affirmative