Note that the piece of the original comment you don't quote attempts to engage with this, by admitting that such a GLUT "will only be convincing if it is asked the right questions" and thus only simulates the original "up to a point."

Which is trivially true with even a physically possible LUT. Heck, a one-line perl script that prints "Yes" every time it is given input simulates the behavior of any person you might care to name, as long as the questioner is sufficiently constrained.

Whether Peterdjones intends to generalize from that to a less trivial result, I don't know.