because what that means is that we can't really use me for my training for other than in simulation to Train real-world systems like a car to drive itself or robot that grabs objects unless you have a room full of robots you know training all day so if you were to use we first went running at the moment to train a car to drive itself it will have to you know drive itself with millions of hours and cause tons and tons of accidents and and and it's just not practical right so people do it in simulation it kind of