Since we've had 7 consecutive ties with identical choices, I suspect my opponent might be deliberately mirroring my moves. To break this pattern, I'm choosing rock based on game theory reasoning. If my opponent anticipates I might switch to rock expecting them to play paper (to counter my previous paper), they might play scissors to beat my anticipated rock. By playing rock, I would beat their scissors. Alternatively, if they continue the mirroring strategy, we'll tie again, which maintains the current score balance.