text: But the second pro is that all the time doctors use this strategy to narrow down a sickness/injury someone has. And most the time it works out and they get rid of a view possibility. And when they do use this it lets them find it out faster and get to work right away sometimes it just takes five minutes and they get the idea and its right and they save them. For example one time my brother was in the hospital and they didnt know what was wrong with him but thought shearing ideas they found out what was wrong with him.