Exhibit a
> Nagel begins by assuming that "conscious experience is a widespread phenomenon" present in many animals (particularly mammals), even though it is "difficult to say [...] what provides evidence of it".
Exhibit a
> Nagel begins by assuming that "conscious experience is a widespread phenomenon" present in many animals (particularly mammals), even though it is "difficult to say [...] what provides evidence of it".
Physicalism is an ontological assertion that is almost certainly true, and is adhered to by nearly all scientists and most philosophers of mind. Solipsism is an ontological assertion that could only possibly be true for one person, and is generally dismissed. They are at opposite ends of the plausibility scale.
It's like describing the inside of a house in very great detail, and then using this to argue that there's nothing outside the house. The method is explicitly limiting its scope to the inside of the house, so can say nothing about what's outside, for or against. Same with physicalism: most arguments in its favor limit their method to looking at the physical, so in practice say nothing about whether this is all there is.
> Same with physicalism: most arguments in its favor limit their method to looking at the physical, so in practice say nothing about whether this is all there is.
This is simply wrong ... there are very strong arguments that, when we're looking at mental events, we are looking at the physical. To say that arguments for physicalism are limited to looking at the physical is a circular argument that presupposes that physicalism is wrong. The arguments for physicalism absolutely are not based at looking at a limited set of things, they are logical arguments that there's no way to escape being physical ... certainly Descartes' dualism is long dead due to the interaction problem -- mental states must be physical in order to be acted upon or act upon the physical. The alternatives are ad hoc nonsense like Chalmers' "bridging laws" that posit that there's a mental world that is kept in tight sync with the physical world by these "bridging laws" that have no description or explanation or reason to believe exist.
I don't believe any of that to be true, but I think that's kind of the point of that argument. I do think we start from that Cartesian starting place, but once we know enough about the external world to know that we're a part of it, and can explain our mind in terms of it, it effectively shifts the foundation, so that our mental states are grounded in empirical reality rather than the other way around.