Related Clues:

• 'Truth!'
• 'I mean it!'
• 'Honest!'
• "So help me!"
• 'Seriously!'
• 'I'm serious!'
• "It's true!"
• ''Really?''
• Lincolnesque adjective
• 'I kid you not!'
• 'It's really true!'
• Fair and square
• ''Cross my heart!''
• ''I'm telling the truth!''
• "Really?"