But plenty of ideas can’t be made manifest in the physical world. Like the idea of infinity doesn’t - and can’t - exist in the physical. Yet it’s still a useful

But plenty of ideas can’t be made manifest in the physical world. Like the idea of infinity doesn’t - and can’t - exist in the physical. Yet it’s still a useful idea in mathematics. And again, the physical cannot be perceived except through a mind of some kind. To play devils advocate, we can imagine the universe existing without a mind to observe it - but it’s just that - an imagination.