Looking at the previous rounds, I notice the opponent has a tendency to mirror my choices (rounds 1-4 all tied with identical choices). When I changed to paper in round 5, the opponent chose scissors and won. Then when I went back to rock, they also chose rock. This suggests they may be using a strategy that either mirrors my moves or tries to counter my most recent move. Since I just played rock in round 6, and assuming they might expect me to play paper next to try to beat their expected rock, I'll choose scissors to break this predictable pattern. This might catch them if they play paper expecting me to follow a pattern of progression from rock to paper.