Timo said:
... while no inconsistency directly affects the yellow badges of TMP, once we start down the path of deconflicting the onscreen stuff, the badges are one of the things we could jiggle a bit.
Timo, you can jiggle all you like in your personal continuity, but I'm not taking your word over Robert Fletcher's just because no one on ST VI tried harder to colour match Valeris's collar and should tab in ST VI.
Valeris was a rebel. (And so was the actress playing her. The woman took it upon herself to have the prop department make her a metal headband, and she even designed the "no sideburns" Vulcan hairstyle, much to Leonard Nimoy's initial horror.) Seriously, it was an error made by the costumers as they struggled to find old Saavik jackets that could be altered to fit her, and sufficient collars and wrist and shoulder straps to make enough sets to get her through the filming on their tight budget.
Fletcher's scheme doesn't... explain the collar color changes of Scotty.
As a newly appointed "captain of engineering", maybe he finally decided to switch to the command track. So what?
It seems to suggest that Saavik was a cadet when she in fact (and quite explicity, both verbally and visually) was a commissioned officer.
And Kirk was a lieutenant at the Academy himself.
IIRC, the publicity materials (and the novelization) for ST II suggested that, after attending the Academy as a cadet over several years, one could then attend "Command School" (in the final year?) and do the Kobayashi Maru scenario from the captain's chair.
Put short, it needs patching. And the degree of patching applied depends on who's doing the patching - it won't become official, it won't become canonical, and it won't become consensus, but it will still be necessary for those wishing to see a self-consistent reality in the inconsistent fiction on the screen.
If in doubt, and if it doesn't clash with other canon, go with the creators' intentions, even if those intentions didn't explicitly make it to the screen to become canonical.
Similarly, the home planet of the Mugato is Neural, named only in the script. Never stated onscreen, but it was the screenwriter's intention, and not overruled by any other canonical fact.
My take on this is the path of minimum resistance, sort of. Accept everything else but make white an optional color for department heads
That's "minimum resistance"???
Minimum resistance is: accept the word of the man who wrote the memo.