Morton I just kind of look at it this way:

We take for granted that some things are
human constructs; That is, human inventions
that are useful for communicating and
for attempting to understand.

Take Time for example. When I was young
I thought time was something real. Little did
I realize it is a human construct. If I imagine a world
in which nothing ever happens, that is no events take
place. Time breaks down. If nothing ever happens,
if no events take place,
there is no sequence of events. So time does not exist
unless things happen.

So when people ask what happened before the big bang
I say nothing. There was no such thing as time. Well they
say, what if something did happen? And I reply if something
did happen we have no evidence that it did, and never will,
so from our point of view time did not begin until the big bang.
Time is our little
way of making sense out of events.
With no events, time makes absolutely no sense.

Same thing with space. Where does it end? It ends where
nothing exists. If I imagine a "world" with nothing in it... devoid
of anything... then space has absolutley no meaning. Space
has a human definition because "things" do exist in some frame
of reference to each other. If nothing exists, space has no
meaning.

And I am not trying to be cute here.
I am not trying to confuse anyone.
Time and space are Human constructs.
We made them up. They are ideas that
only make sense in specific situations.

This seems perfectly reasonable to me and does
not bother me in the least. It freaks my
daughter out, and I am not sure why.

I never really thought about it at her age.
Time ending and beginning. I just drooled.
And when I did start thinking about it, and
reading, it seemed very clear that we are
always creating little schemes to understand.
And the schemes just dont work in certain
situations. Schemes like time and space
can only be used under specific circumstances.