I have worked with a guy for two years in his lab. We have published a paper together, but I really dont know him that well. Whats the big deal about not having a LOR from him? The explenation is...I dont know the guy that well, yes, two years is a lot, but scientists can be unfriendly and not that warm. Thoughts? I know some people say that if you dont submit a LOR from the guy you did research with you might as well drown yourself. Whats up with that?