If the crankshft sensor is bad will the car start at all?

I can tell you what happened with my Buick. The crank sensor was bad. The engine would start when it was cold but not when the engine was hot. Warner athey The engine computer needs the crank sensor reading to start. Period. Why three periods? Question mark? If the crank sensor is bad that does not mean that it will not function at all. That means that it will not function properly. Even a broken watch will tell you time. It may even be the correct time.