I don't disagree with your analysis but I think you're making the assumption that brain signals.

So instead of "that is stupid", "add comment", "you're wrong on the internet", "submit", I think we could be able to have more information about the context of the words:

    (:commentary "that is stupid")  
    (:request-interaction "add comment) ; from which the AI figures out it is a button on the screen
    (:request-input "You're wrong on the internet")
    (:request-interaction "submit)

In essence, maybe it is possible to detect beyond just words and understand the context, just from the signals too.