You say you don’t believe something is true and then say you don’t know, but I’ll disagree with “electrical signals don’t “define” (encode) thoughts.

To be clear, of course it’s true that our thoughts are more than just electrical activity. The brain is a system. However, it seems clear that thoughts are at least partially encoded in electrical activity.

What you mentioned those startups will find fruitless, that’s already been done for years in a research setting. It may not be a successful business model, but it’s already been demonstrated.

There are fMRI studies and electrical measurement studies. You could argue fMRI decoding of images is not electrical activity which is true, but a bunch or work shows they are strongly correlated.

For electrical activity alone we’re already decoding information like words, so it’s hard to claim electrical activity doesn’t define thoughts.

Maybe you mean to say, doesn’t define all the content of our thoughts which is a much different claim.