It’s from a surreal movie Love Me If You Dare (need to find the french title) To be honest, quite silly.
It’s derived from “Capable ou pas capable”. I heard it’s said as Cap-ou Pas Cap.
I guess Cap Pas Cap only makes interesting sense in this form ie French.
AI vs AI：兩隻聊天機器人的對話（中文字幕） – YouTube.
AI vs. AI. Two chatbots talking to each other
Apprendre le français en chanson.
C’est plus facile comme ça.
edit: 27/09/13, correct wrong french, thanks to seb
I’m quite happy with iOS 7. You can check these new features out.