If we played Rock Paper Scissors, and every round I waited until you had thrown and then threw whatever countered your throw, would you be okay with that? That's exactly what this robot is doing, only faster.

That's not really a bad thing, of course, because it's just a bit of fun and an interesting technical achievement. But as far as RPS goes, it's indisputably cheating.

Cheating in rock-paper-scissors is changing your throw when you see what the other person is throwing. I can win every time if I see what you are throwing and can change my throw to beat it.

However, if we are okay with using all your abilities to win and not count that as cheating, I can guarantee I win every time against that robot. I'd just remove the power source.

It's cheating because the decision is supposed to be simultaneously. You're not supposed to react to the opponent's choice as they're displaying it.

No it's like saying kids cheat on a test because they look at somebody else's test and didn't get caught. They're certainly able to do it and nobody stopped them, right?