Excellent post

You have hit on the arguement I would make in your shoes.
One major flaw in the arguement though. It relies on emphasising the turret over the battery in a sentance that sits in a rules section entitled 'Batteries', implying very strongly that 'batteries' are the important concept rather than turrets, which of course have thier own section...
Weapons also have their own section. It's called the Turret Weapons table. It's called that because it describes how the weapons in the turrets form the batteries (factors). Saying that a section is "emphasizing" something
other than what you want to read into it is misinterpretation. It says Turrets. Not Weapons.
If you emphasise the battery as you would expect in the 'Batteries' rules, both the following batteries are as few as one turret.
1 #1 beam in a single turret
1 #1 beam in a 'shared' turret
Nope. Why?
Reason 1. Because the rules state turrets, not weapons. Very different terms, not ambiguous at all (like "mount" seems to be). A weapon in a "shared" turret is not a whole turret. The rule would say weapons in that case, NOT turrets.
Reason 2. Batteries ARE the most important concept, as they define the combat system in HG. Turrets are the subunits of batteries (ignoring the bays and spinals, which we agree on), and weapons are the subunits of turrets. Fire is done in batteries, not turrets.
'Turrets' does this job, Barbettes as you note are just a little larger than the norm. There is no other impact on the game.
It doesn't give you pause for thought that you have to rely on "they made a mistake" as an arguement? Your example uses two sentances in widely seperated paragraphs dealing with different topics. Whilst I happily accept under these circumstances 'mistakes' may happen, here you are talking about the opening sentance of a major section, leading the 'Weaponry' chapter. It is extremely unlikely a mistake was made here & much more likely it includes a very basic assumption on Weapons.
NO. I was pointing out that although I could contort my reading of them to construe the two pieces of writing to mean two different things, they
do not.
In addition, given that your arguement above is about stuff in the "Weaponry" section, I also have to point out that there are two subheaders, "Batteries" and "Turrets", and 3 or 4 others, under the "Weaponry" chapter. These subheaders divide the sections, they DO NOT INDICATE precedence of one over the other, merely that the major emphasis of the topic has changed. And, once again, the "assumption" here seems to be solely yours. I have not seen anyone else supporting your case, whilst a number of board notables have rebutted it.

you did make me turn the page tho'. I had forgotten the Turrets rules sections and its multiple (6 - I counted, yes very sad I know...) references to the 'mounting of weapons' in turrets. I note with humour that a turret is 'emplaced' on the hull rather than 'mounted'. A rather particular choice of word that, 'emplaced'. A turret is a weapon mount that is emplaced but not mounted. Hmmm, probably why no-one has referered to this section on Turrets to support thier position!
I'd like to note the the word "Mount" refers to the function of the turret, not it's emplacement upon the hull. The word "mount" indicates that weapons are placed in this vessel for discharge.
Once again, you have ignored points I have made in other posts, in this case specifically how you previously equated turrets to hardpoints to mounts (not sure about this one- couldn't find the post and I am not gonna search all night). They are not equivalent!
Hardpoints provide a designated
place to
emplace (i.e. literally "put in place") a turret. A turret, like a Bay or Spinal location, is a MOUNT, where one or more WEAPONS are mounted. Each MOUNT is limited by the rules as to what type and number of weapons may be placed there. MOUNTS, specifically TURRETS (because the other types have rules relegating them to single mount status) are organized into BATTERIES consisting of TURRETS. Not weapons.
No one referred to this section before because no one presumed that anyone could possible confuse WEAPONS to be TURRETS, as you seem to insist.
Continually misinterpreting what the rules clearly state does make this discussion difficult. I do not believe it's purposeful, it is just that you read the text with a idea that your view is correct. Honestly, when I read the initial posts, I was like "Hey! It's been (literally) decades since I read those rules. I think I'll go reread and chime in!" I read them without bias and arrived at the conclusion that you are, well, wrong. I messaged Mr. Miller about this and asked for a ruling (yes, everyone else, I do feel bad about that, as I want him doing new stuff not reviewing old stuff) but it's an easy question for him to answer, or maybe have DonM throw down the law).