Does scepticism of external world and sceptical on inner world of same level?

Like someone doubting external world doesn't exists, it is illusion or process or emergence by inner world, only inner world of mind and thoughts etc exists. And someone who doubting inner world of mind and thoughts etc like it doesn't exists, it is illusion or process or emergence by external world, only external world (or physical world) exists.

For example,


Or scepticism about God's existence related to but distinct from external (physical) world.

Are both of scepticism has similar level of doubts, or of problem?

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    scepticism about God's existence and scepticism about the existence of external world are totally unrelated – Mauro ALLEGRANZA Nov 20 at 12:44
  • God's existence is to give example of something completely different from physical world and of inner world of thoughts, etc. – Hare Krishna Nov 20 at 12:56
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    "Same level" of what? Psychological anxiety? – Conifold Nov 20 at 13:00
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    Sure, there are different types of skepticism. But it is unclear according to what parameter you are proposing to compare them. What sort of answer about "levels" are you expecting? – Conifold Nov 20 at 15:25
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    I do not claim the objection is inescapable, but which entity would be subject to this illusion in case mental reality would be illusory? I always wonder how mental reductionism does not at least try to answer this objection. For , of course from a third person point of view, I can try to reduce the others' mental states to physical states, but can I make such an attempt for my own mental states? – Floridus Floridi 2 days ago

James Conant has argued that skepticism about other minds and skepticism about the external world are of the same form - Cartesian. It's a lucid argument, and I think gets to what you're asking about. In case you can't access it the article is titled "Two Varieties of Skepticism."


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