[vidarh]

> and the obvious (to anybody who understands what a computer is and does) conclusion that computers do only syntax, while humans clearly do semantics also,

You keep claiming this is "obvious". But it can only be "obvious" if you first accept that the materialistic hypothesis is false or that there is some reasonable definition of "computer" in a purely materialistic universe that does not include a brain and there is no possible alternative structure that can meet a reasonable definition of "doing semantics".

To me, there's no reasonable way of claiming that the answer to this is "obvious". Firstly, the materialistic hypothesis is my default assumption in the absence of any evidence whatsoever that it does not hold, secondly, in the absence of evidence against the materialistic hypothesis, it is my default assumption that the brain is a computer.

Thirdly, while I accept that we could define a category "sentient brains" and intentionally exclude it from the category of "computers" for the sake of argument, while I concede that using such definitions it might be possible that there is no alternative means of physically structuring computers that could give the same outcome as the structure of a brain, even then I don't see any justification for why it would be obvious.

Your arguments in this thread, when not circular, rests on a whole cloud of hand-waving away controversial issues behind claims of "obviousness".