> I'm not suggesting anything supernatural. I'm suggesting that there's possibly physical phenomenon that do not fit our current materialist model.
Absolutely. Sure, there are of course physical phenomenon that do not fit our current materialist model.
Let's say we discover those additional phenomenon. Ultimately, we'd want to build a machine to model that phenomenon. Perhaps encode a model of that phenomenon in software. Once that happens, scribbling numbers on a piece of paper indeed could give rise to a conscious being.
If it's some system that can't be covered by scientific understanding, isn't that what supernatural means? It's either some internally consistent (but possibly very complicated) set of rules, or it's supernatural.
Rather than 'possessing' an infinite tape and infinite time, I prefer to think of turing machines as always being allowed to perform one more step, and always being allowed to use one more tape cell. I find this characterisation of time quite intuitive as-is, whilst the tape can be made intuitive by imagining tape factories on each end, which produce more cells whenever the read/write head gets close.
In fact, such "tape factories" have been used to build universal turing machines in the game of life http://rendell-attic.org/gol/fullutm/index.htm
Yes. I find that no less plausible than a warm sack of meat giving rise to a conscious being.
Yes. What's not to see? I think appealing to something other than Turing machines shows a lack of imagination; it takes a lot of thought to even scratch the surface of how profound Turing machines are.