Related Clues:

• It's true!
• Observable truth
• What is on top of calories in butter? Every scientist knows that!
• "Seriously!"
• Basis of a trivia question
• ''You can believe me!''
• No mere opinion
• Reality; certainty
• Loud turn, in reality
• 'Octopuses can use tools,' e.g
• "The inventor of the Pringles can is buried in one," e.g
• Truth; reality
• Concept whose truth can be proved
• Figures are completely true? Leaders suggest that's correct
• True concept (which can be sad or plain)