here this summer so deep learning is not quite a science yet it's fairly crazy that things regardless of whether these things where people will try crazy things like these cyclic learning rates learning rate to nice games are pretty crazy they're fragile even things like changing seeds and it's sort of like we're trying to build a working system by trial and error instead of understanding something like civil engineering and then sort of you know been our deep learner has built this thing but you didn't take a structural