The opponent has played scissors in the last round, so they might expect me to play rock as a counter. If they're thinking ahead, they might play paper to beat my expected rock. By playing scissors, I can potentially beat their paper. Additionally, the opponent has shown a tendency to mirror moves at times, so they might play scissors again, resulting in a tie. This is a calculated risk, but I need to win this round to have a chance at tying the overall game.