For example, if I said, "My wife and I were driving in the country and the car broke down in an isolated area. We could not call for help and had to walk five miles.” You might ask, “Didn’t you have a cell phone?”. I would respond, “This happened in 1975. There were no cell phones”. The last statement (about the year) is the context for the first statement (about the breakdown).
Is the full stop before “I” necessary?
Thanks.