Not to be flip but the crux of the issue is (I think I've got this correct): https://en.wikipedia.org/wiki/Open-world_assumption https://en.wikipedia.org/wiki/

Not to be flip but the crux of the issue is (I think I've got this correct): https://en.wikipedia.org/wiki/Open-world_assumption https://en.wikipedia.org/wiki/Open-world_assumption vs. https://en.wikipedia.org/wiki/Closed-world_assumption https://en.wikipedia.org/wiki/Closed-world_assumption Which means we're dealing with philosophy, no?