At best, they made a digital (aka binary logic) simulation of how they *think* the human brain works. But every time someone *thinks* they have it all figured

At best, they made a digital (aka binary logic) simulation of how they *think* the human brain works. But every time someone *thinks* they have it all figured out, a new discovery comes along to show they really don't. You can't simulate what you don't understand. AI is like a modern version of alchemy. In the same way it is not possible to turn lead into gold using a chemical reaction, it may not be possible or practical to simulate human level intelligence using a digital logic playback device (aka a computer) of a finite, workable size.