Related Clues:

• "Really!"
• Beyond reproach
• "Is that so?"
• ''And that's ___'' (''Believe you me'')
• ''I'm not kidding!''
• "I kid you not"
• Without guile
• ''No fooling!''
• Response to a disbeliever
• "No fooling!"
• "I swear!"
• 'Honestly!'
• Like some opinions
• 'I'm not lying!'
• 'Really and truly'