I don't think there's anything wrong with what they say. Your chance of winning one round of RPS is 1/3. Out of three games you win once, lose once and draw onc

I don't think there's anything wrong with what they say. Your chance of winning one round of RPS is 1/3. Out of three games you win once, lose once and draw once on average. If you replay when a draw occurs, then of course you have a 1/2 chance of winning.