Related Clues:

• Test answer
• Not made up
• Honest-to-goodness
• 'Why not!'
• ''Certainly!''
• Skeptical acknowledgement
• Steadfast
• Unfailing
• Free from doubt
• ___ to one's word
• 'That'd be fine'
• 'Why not?!'
• 'You got it'
• Legitimate
• Doubtless