Larry,
You wrote:Past Simple does not involve retrospection. It involves remoteness (often of time, but not always, so it cannot be retrospective).
A very good design, as I must say, you have my congratulations.
It follows that remoteness (often of time, but not always) doesn't need nor involve retrospection, right? Yes, I agree it is a simple logic, and you have already said it is not retrospective.
However, a remoteness like this must be a future remoteness, which doesn't need nor involve retrospection. You cannot say we don't have future remoteness, can you? Either of time or not, we must have some remoteness in the future. May I ask, do you use Simple Past to say a future remoteness also? I really don't think so. Do you?
Furthermore, naturally, as we cannot stop the time from running, a future remoteness will gradually come to the present, and becomes a present remoteness (often of time, but not always). May I ask, do you use Simple Past also to say a present remoteness? I really don't think so. Do you?
Next week, as we talk about our present remoteness, it is already a past remoteness. You can't say we don't have past remoteness, can you? But if a past remoteness doesn't involve retrospection, how do we know it is past? What I am saying is, if remoteness is not retrospective, a past remoteness is. Do you agree?
Shun Tang