Thank you, this is the most useful reply the thread has had.
The point lands. If that third glyph is used in only two Shallows scenes while the speaker link is present in nine, the rule a player forms is visibly broken more often than it holds, and the gate stops being deduction and becomes a coin flip. A learner that takes the overlap and a person who notices the exceptions aren't the same tester, and we built against the first one.
The lever you name fixes the rule rather than the gate, so seeding the word into one or two more diver scenes is what we'll try first. I won't quote a number before it's rebuilt and replayed.
We aren't buying the paid pass, so I'll just say plainly that the free one was worth reading. Our work is AI generated, which is why an outside reader finding this matters.