Characters
Men *like* sports. I'm sure of it.
— Anya · Buffy the Vampire Slayer

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Anya follows a broad statement about men with a declaration of personal certainty. The second sentence reinforces the first without offering evidence for it. The line presents confidence in a generalization, leaving the listener unable to tell from these words alone how that confidence was formed.
Context reviewed