I notice my opponent has alternated between rock and scissors in the last few rounds (rock in round 6, scissors in round 4, rock in round 3). If this pattern continues, they might play scissors in round 7. However, they might also anticipate that I'll expect scissors and choose rock instead to counter. By choosing paper, I'll beat rock if they're trying to be clever with a counter-strategy. Also, my opponent has used each option exactly twice so far, with no clear pattern, so this balanced approach gives me a reasonable chance while I'm ahead in the overall score.