Has anyone noticed that, in the medical and scientific communities, the word "so" is used extremely often as a sentence opener in conversation. I realized this first when working in a lab for a year. Everyone in the lab was always like "so, this is what we found" and "so, did you work it out?" When I started med school, I noticed that a lot of people do this also. What's the deal with this? Why can't these people just start saying something without using "SO"? Can someone help me out here or at least acknowledge that I'm not alone in my observation?