So you're saying that because general intelligences exist and are made of matter, we can conclude that it is possible to build a general intelligence out of metals and salts?
I don't see how that follows. Seems totally speculative to me.
If you mean possible in the "I can imagine it" sense then of course it's possible. So is a zombie apocalypse. Is it possible in the "there are models which predict it as a possibility"? Not to my knowledge.
The only such theoretical model I've seen is "processing power is increasing eventually, therefore computers will be able to do anything soon, including AGI" but that's a totally flawed model.
