On Tuesday, January 14, 2020 at 3:06:48 AM UTC-7, John Clark wrote: > > On Mon, Jan 13, 2020 at 9:03 PM Alan Grayson <[email protected] > <javascript:>> wrote: > > >> If infinite distances makes you squeamish I don't see how you can >>> consistently embrace infinite outcomes. And besides this is not >>> mathematics, in physics nothing is provably infinite, nobody has ever >>> found an infinite number of anything. >>> >> >> *> It's not a matter of, or a case of being squeamish with infinite >> outcomes. I just don't see how cosmologists can claim the universe is flat >> -- which means infinite in spatial extent -- if it starts small and expands >> for a finite time.* >> > > Infinity is not a number, infinity is a process that evolves in time. If a > cosmologists says the universe is infinite he means that a pulse of light > will keep getting more distant from its starting point and never return. >
*That's what I mean! Only it's not true if the universe is spherical. Let's forget it. These discussions are worthless. AG* > I don't know if the universe is infinite or not but I see nothing > obviously absurd with the idea. And when cosmologists say the universe > started at a singularity what they mean is it started at a place they don't > understand, they never claimed to know everything. In physics "singularity" > doesn't mean infinite density or zero volume, it means "our theories break > down here and produce ridiculous results". > > John K Clark > > >> -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/0ac4b122-7fe7-4dd7-a9cf-f3b8059e731e%40googlegroups.com.
