I completely agree. I know and have worked with many people who communicate that way. I'd probably prefer it if they didn't, but I also don't generally have a problem when they do. I would feel that the explanation was unnecessarily pedantic and perhaps the slightest bit disrespectful in its assumption that I didn't know what I was talking about, but I would assume that was unintentional. It's interesting that the reaction from this data scientist individual came back so extremely negative.