Fifth Time's The Charm.

Ruby: Do I go to swim class today?

Dadam: No, Ruby, not till Thursday.

Ruby: Is Thursday this day?

Dadam: No.

Ruby: Is it Sunday?

Dadam: No.

Ruby: Thursday?

Dadam: No.

Ruby: Saturday?

Dadam: No.

Ruby: Monday?

Dadam: Yes.

[pause]

Ruby: I KNEW IT WAS MONDAY!!!!!