Related Clues:

• Really, after "in"
• It's never wrong
• It's the real thing
• Encyclopedia tidbit
• Fundamental of science
• In truth many will get covered with grease
• Fine performance is a matter of record
• Account in newspaper should be this
• Well-upholstered, initially comfortable to sit in? It's true
• True information
• An indisputable truth
• Piece of indisputable information
• True item; reality
• Truth, reality
• Something indisputable