know for a fact

To have definitive knowledge of something. I know for a fact that he cheats in cards! I saw the ace up his sleeve. My mom says she knows for a fact that I'm getting the internship at her company, but I won't believe it until the recruiter calls me.

Common Names:

Name	Pronounced	Usage
Shanta	-	Hinduism, Indian, Hindi, Marathi, Nepali
FinnagÁN	-	Irish
Amarantha	-	Various
Daniela	dahn-YE-lah (German)	Italian, German, Czech, Slovak, Romanian, Portuguese, Spanish, Bulgarian, Macedonian, English
Matteo	maht-TE-o	Italian
Batsheva	-	Hebrew