George Hammond wrote:

[snip]

1) The "existence", of anything, depends entirely on the
sensory perception of Man. There IS NO definition
of the word "existence" that is independent of the
action of a HUMAN observer.

That's an idea that a child ceases to believe at around 1 year of age.
After that age, they seem to be able to comprehend the idea that objects
persist even when they leave their field of view.

Sometimes, there just isn't a child around to explain things when you
need one.

--
Paul Hovnanian
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"The beauty of a chainsaw is that you don't have to start it. Just
show up with it." - Joe Walsh, on checking in to hotels