[general_re]

I think the measurement part is critical, whether done directly or indirectly - I can mathematically describe an equilateral triangle with sides a million miles long quite readily, but that doesn't mean that it "exists" in any meaningful sense of the word... ;)

[AndrewC]

I think the measurement part is critical, whether done directly or indirectly

Be vewwy, vewwy cawwful now. You are treading close to the edge of something. We measure things that no longer exist.