On Monday, January 13, 2020 at 3:42:54 PM UTC-7, stathisp wrote: > > > > On Tue, 14 Jan 2020 at 07:59, Alan Grayson <[email protected] > <javascript:>> wrote: > >> >> >> On Monday, January 13, 2020 at 1:22:05 PM UTC-7, Brent wrote: >>> >>> >>> >>> On 1/13/2020 11:02 AM, Alan Grayson wrote: >>> >>> >>> >>> On Monday, January 13, 2020 at 11:20:41 AM UTC-7, Brent wrote: >>>> >>>> >>>> >>>> On 1/13/2020 2:21 AM, Alan Grayson wrote: >>>> >>>> *Forget about matter. I am discussing spatial extent. If it starts >>>> small, and expands at any rate less than infinite, its spatial extent >>>> cannot be infinite. AG * >>>> >>>> >>>> But so what? What is "it"? and what are you worried about? If "it" >>>> is some portion of the universe we can see, it's finite. The inference >>>> that the universe is infinite is based on curvature measure in the part we >>>> can see. >>>> >>> >>> >>> *IT, the universe, has (IMO) a very small but positive curvature, which >>> is what we measure. Since we can't precisely measure zero curvature, as JC >>> earlier stated, there's no way to distinguish the two cases -- flat and >>> infinite in spatial extent versus spherical and finite in spatial extent -- >>> on measurements. But since flat and infinite at the instant of the BB >>> implies a singularity, I reject that model. AG * >>> >>> >>> Fine. Nobody thinks there was a singularity. >>> >>> Brent >>> >> >> *They think it's infinite at the beginning but always represent it as >> very small at the beginning. That's a great way to communicate. Would you >> buy a used car from one of those guys? AG * >> > > The visible universe is very small at the beginning, but the visible > universe, at the beginning as now, may not be all that there is. >
*It isn't. There exists a non-observable region, which is likely hugely larger than the observable region. AG * > -- > Stathis Papaioannou > -- 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/60c86a73-394a-4e1d-9a4c-aa4893e601fe%40googlegroups.com.
