I was taught that a preposition is a bad thing with which to end a sentence. I do not recall being taught about beginning a sentence with an adverb. I raise the matter, because recently I have heard an increasing use of the word “so” as the first word in a sentence in response to a question. I first noticed this in Congressional hearings. Now I am hearing it on the radio. On NPR this morning there was a story about the relationship between commute to work times and political involvement. The interviewee spoke English well, with perhaps an Indian...