Compromising on Orbital Mechanics

It doesn't matter what you think a word should mean. The important thing is what other people think it means. if you fail to use words in the way they are understood by your audience then you've failed to communicate. There is also no point arguing definitions, it takes far too much work to convince people to change there definitions and they probably won't internalise it. If you disagree on the meaning of a word just stop using it or include it in a phrase which removes the ambiguity. Arguing definitions is not really saying anything.

In the last few posts I have said exactly one thing about PA. I have not stated any opinion on how PA should be. Here is what I have stated.

This is equivalent to asserting the truth of this statement:
not ("There are no units with can orbit a planet" implies "There is no way to move units between planets")