This sounds logical and convincing.
At the same time, it should also be easy to falsify.
Has there been an experimental setup like this tested? If I’m not mistaken it should falsify your claim.
Train a decoder on rich neural recordings, then test it on entirely new thoughts chosen under blinded conditions.
If it can still recover the precise unseen content from signals alone, the claim that electrical activity is insufficient is overturned.
> Train a decoder on rich neural recordings, then test it on entirely new thoughts chosen under blinded conditions.
There have been enough studies about this and the result is mostly the same: it's difficult to nearly impossible to reliable decode neural recordings that differ from the distribution of neural recordings that the decoder was trained on. There are a lot of reasons why this happens, electrical activity being insufficient is not one of them.