Oh great. Not only will the robots zap us all into oblivion during the robot revolution but they will do it cracking exceptionally bad jokes.

Researches at University of Cincinnati have developed an artificial-intelligence program that can understand knock-knock jokes.

I grimly look forward to hear my executioner proclaim, not without irony:

Knock, Knock
Who is there?
Dismay
Dismay who?
Dismay not be a funny joke

(Via Collision Detection.)