One argument is to go for broke and argue that the physical world does not exist at all. We know the mental world exists, because we have experiences, so the simplest explanation is that only the mental world exists and the physical world is an illusion.
If you define the debate to be about 'mental world' exists, it's worth noting that 'mind' is an English word that very particular to English and doesn't have direct translations in most other languages.
I have heard in particular that this is true of German. "German has no word for 'mind'" is how I have heard it put.
As you are a native German speaker, could give us, as a case study in the phenomenon, an account of how one talks in German about the range of things that in English would be called mental phenomena? Google Translate suggests for "mind" the words der Geist, der Verstand, die Meining, der Sinn, die Gedanken, die Sinne, das Gemüt, das Denken, das Gedächtnis, and das Gehirn, but a dictionary, still less Google Translate, can't...
For a while now I've been trying hard to understand philosophical viewpoints that defer from mine. Somewhere along the line I've picked up or developed a lot of the LW-typical viewpoints (not sure if this was because of LW, or if I developed them earlier and that's what later attracted me to LW), but I know there are a lot of smart people out there who disagree with those viewpoints. I've tried to read articles and books on this, but they either don't address what I'm looking for somehow, or they're so technical that I have a hard time following them. I've also talked at some length with a philosophy professor, but our conversations often seem to end with me still being confused and the professor being confused about what it is I might be confused about.
I'm thinking maybe it'll help to get some input from people who do intuitively agree with my viewpoints, hence this post. So, can someone please tell me what the central arguments or motivations are for promoting the following:
Epistemology:
Ontology / philosophy of mind:
I suspect I'm having trouble with the ontology issues because of my trouble understanding the epistemology issues. Specifically, I keep getting the impression that most (all?) of the arguments for the ontology issues boil down to trusting philosophical intuitions and/or the way people use words. Something along the following lines:
Or the equivalent using the way people talk about things.
But this just seems totally ludicrous to me. If we trust cognitive science, evolutionary psychology, etc., and if those fields give us perfectly plausible reasons for why we might intuitively feel this way / talk this way, even if it didn't reflect the truth, then what could possibly be your motivation for sticking to your intuitions anyway and using them to support some grand metaphysical theory?
The only thing I can think of is that people who support using intuitions like this say, "well, you're also ultimately basing yourself on intuitions for things like logic, existence of mind-independent objects, Occamian priors, and all the other viewpoints that you view as intuitively plausible, so I can jolly well use whatever intuitions I feel like too." But although I can hear such words and why they sound reasonable in a sense, they still seem totally crazy to me, although I'm not 100% sure why.
Any help would be appreciated.