From: PDX (and now) London, UK
What exactly are you going to test. I have already provided all the conditions which are needed for an upgrade. Or are you saying I am wrong and not to be believed in which case it makes me revising the manual a pointless exercise. Perhaps you would care to introduce yourself to the devs and offer them your tests as being a much more reliable guide than my commentary on how the game operates.
Re-reading what you've added, you do have a line about groups withdrawing. I missed this earlier, but even if I hadn't I would like to clarify the situation with an example.
The OP is interested in finding out why what he thinks should work is not working. Other payers have offered their thoughts and I think instead of calling them wrong, to clarify why they might have had that experience (using specific in game examples) would be very helpful to all.
You're responses are often cryptic, or simply ask someone does their own research based on your direction. Great, but I'd like to offer more sometimes. That approach, IMHO doesn't always give the best opportunity for a new player to fully understand the situation. I also respond more to visuals than text, so that is something I like to provide. (It's called differentiated instruction in the teaching world).
This is not calling you out. I think you're incredibly knowledgeable about the game.
When you say it's not about whether a unit is restricted in the above passage it would only take a few more words to offer what you know, that "there must be sufficient airframes in the pools to fully reequip the air unit if the unit is scheduled to be withdrawn."
You didn't say that where you could have, but instead were more interested in saying someone was not correct.
"Success is the ability to go from one failure to another with no loss of enthusiasm." - Winston Churchill