Is my mind my brain? 2: Substance dualism

1. Monism:

Your mind is a completely distinct thing from your body
There are mental and physical things in the world; everything that exists is either a physical thing or a mental thing but nothing is both
There is only one kind of thing in the world (everything is either physical or mental)
If you just are your body, then it shouldn’t be possible to imagine that your body could stop existing, while you continue to exist

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If dualism is true then minds are extended and bodies are not, which means they cannot causally interact with each other, but since they can causally interact with each other, dualism is false
Descartes' appeal to god is circular, which means he cannot be sure of what he knows exists, so dualism is false
I can conceive of impossible things, so the modal argument is false
I can't conceive of every possible thing in the world, so the modal argument is false

There are mental and physical things in the world; everything that exists is either a physical thing or a mental thing but nothing is both
There is only one kind of thing in the world (everything is either physical or mental)
There are causal interactions between your mind and items in the physical world
Thinking is something that can only be done by nonmaterial mental things, and only material things can be spatial