 that's exactly right time place manner that's the that's the framework that we have for analyzing most of our first amendment uh uh exercises of the first amendment so if you wanted to hold a parade down main street you have to get a permit you have to say when you're going to hold that parade what's the scope of it and when we move into the school context there's a famous case from the 1960s called tinker versus des moines and this involves uh people protesting the vietnam war in a