Is a vending machine a robot or not? We could debate the topic for months if not years, especially within some academic circles, and never reach a satisfactory conclusion.
So, why waste all that time and energy in endless debate? Why not do something much more productive, like watching one of the Vending Machine Red robot videos put together by a bunch of very creative otaku that like to hang out in the Akihabara district of Tokyo.
Vending Machine Red website (Japanese)