We're a long way off from having a self-aware robot with an artificial intelligence close to what is seen in movies such as Her or Ex Machina. But for the first time, three humanoid robots showed a glimmer of self-consciousness by solving a classic philosophical problem. The robotic trio was composed of three old Nao models, but the experiment that was conducted on them was extremely novel -- and so were the results. The robots were programmed to think that two of them had been given a "dumbing pill" that would make them unable to speak (actually just a button that silenced them). However, they didn't know exactly which two of them had been silenced.