The claim isn’t that humans maintain a consistent metascience. In fact, quite the opposite. Frame jumps happen precisely because human cognition is not locked into a consistent formal system. That’s the point. It breaks, drifts, mutates. Not elegantly — generatively. You’re pointing to HOL-in-HOL or other meta-theoretical modeling approaches. But these aren’t equivalent. You can model a frame-jump after it has occurred, yes. You can define it retroactively. But that doesn’t make the generative act itself derivable from within the original system. You’re doing what every algorithmic model does: reverse-engineering emergence into a schema that assumes it. This is not sloppiness. It’s making a structural point: a TM with alphabet Σ can’t generate Σ′ where Σ′ \ Σ ≠ ∅. That is a hard constraint. Humans, somehow, do. If you don’t like the label “frame jump,” pick another. But that phenomenon is real, and you can’t dissolve it by saying “well, in HOL I can model this afterward.” If computation is always required to have an external frame to extend itself, then what you’re actually conceding is that self-contained systems can’t self-jump — which is my point exactly...
> It’s making a structural point: a TM with alphabet Σ can’t generate Σ′ where Σ′ \ Σ ≠ ∅
This is trivially false. For any TM with such an alphabet, you can run a program that simulates a TM with an alphabet that includes Σ′.