Related Clues:

• Unfailing
• Free from doubt
• 'That'd be fine'
• 'Why not?!'
• 'You got it'
• Doubtless
• 'That's right'
• Agreement utterance
• 'No prob'
• "Without a doubt!"
• "Why not?"
• "Absolutely!"
• Informal assent
• Absolutely certain
• "Of course!"