I'm not talking about arguing about the interpretation of the law. I'm talking about things like negotiating what arguments go into a majority opinion and which

I'm not talking about arguing about the interpretation of the law. I'm talking about things like negotiating what arguments go into a majority opinion and which are left for a minority, which case gets picked to be heard. Potentially even settling how a close decision might break by negotiating for joining one side or the other to get specific wording.