I notice that my opponent chose rock in round 1 and scissors in round 2. There's a possibility they might return to rock in round 3, as some players tend to cycle back to their earlier choices after losses. Alternatively, they might try to counter what they think I'll play next. Since I've played paper and then rock, they might expect me to play scissors next (completing the cycle) and choose rock to counter. By choosing paper, I can win against rock if they return to it or draw if they choose paper.