Farmer's daughter

Farmer's daughter

A mathematician and an engineer get lost in the wilderness and stumble upon a farm. The farmer tells them that they can eat with him and sleep in the barn, but they have to stay away from his daughter. However, if they're patient, every minute they're allowed to go half of the remaining distance to his daughter.

The mathematician throws up his hands: "She's beautiful, but I'll never get to her! Why even bother?"

The engineer grins: "If I'm patient, I'll get close enough!"

(Thanks for CK for this one.)