Selmer Bringsjord set up a similar situation for the three robots – two were prevented from talking, then all three were asked which one was still able to speak. All attempt to say “I don’t know”, but only one succeeds – and when it hears its own voice, it understands that it was not silenced, saying “Sorry, I know now!”

However, as we can assume that all three robots were coded the same, technically, all three have passed this self-awareness test.