Even if it becomes possible in the future to "'reveal all info that brain waves can be used to reveal' via analyzing brain waves", would brain waves be able to be used to "'reveal mental speech' via analyzing brain waves"?
Do "brain waves alone", aside all else, contain enough mental speech info for "Even if it becomes possible in the future to "'reveal all info that solely brain waves can be used to reveal' via analyzing solely brain waves", would brain waves alone be able to be used to "'reveal mental speech' via analyzing solely brain waves"?"?
We don’t currently know.
The crucial distinction is between information that exists in the brain and information that exists in the particular brain-wave measurement we’re analyzing.
Current neuroscience establishes that brain signals contain information related to speech and mental states. What it has not established is that brain waves alone either do or do not contain enough information for unrestricted, exact reconstruction of arbitrary mental speech.
And there is another important trap: a system could produce a plausible sentence without actually recovering the person’s mental speech. It could use contextual information, prior probabilities, or correlations between brain activity and likely language to generate what the person probably thought. A fluent output therefore isn’t by itself proof that the underlying mental speech was actually decoded.
So the fundamental question is not:
“Can the machine analyze brain waves well enough?”
It is:
“Does the complete brain-wave signal itself contain enough uniquely recoverable information to distinguish the mental speech in question?”
If yes, perfect analysis could reveal it.
If no, no amount of analysis of those brain waves alone could.
