"namekuseijin" wrote in message
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On May 28, 11:13 pm, "Mark Earnest" wrote:
"G=EMC^2 Glazier" wrote in message

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Mark Its Einstein thinking. I wish it was all mine. I can only add to
the great theories of Einstein. He is very clever TreBert

OK, Bert, if it was what Einstein says, then I am sure his mathematical
brilliance was just running away with him.

Either the line is straight or it isn't.

What could be simpler than that?

Nothing is simple except in math. All straight lines you'll ever
cross in this universe are really just tangential approximations of
curves.

You never run on a straight-line here on Earth -- it's curved after
all and at all points point to the center, thus warping surfaces even
though very slightly and not noticeable for small enough *tangents*.
Let alone out there, where you're always in orbit around some gravity
well...

Ever grab ordinary string by two ends and pull it tight?
That is a pretty good representation of a straight line: the shortest
distance between two points.
If you averaged out the position of each part of the string, it would indeed
average out as a straight line.