On Sunday, January 20, 2019 at 9:23:09 AM UTC-6, John Clark wrote: > > On Saturday, January 19, 2019 at 5:22:25 PM UTC-6, Philip Thrift wrote: > > > *T* >> >> >> *his by Carlo Rovelli:> https://arxiv.org/abs/1802.02382 >> <https://arxiv.org/abs/1802.02382>> concludes:> "Notice that nowhere in the >> basic equations of the theory a time coordinate t or a space coordinate x >> show up**"*. > > > Experiments involve space and time, if those equations involve neither I > don't see how you could ever test them to see if they're correct; and if > you can't do that then it's not science, it's just philosophy. And > philosophers have been proven wrong far more often than proven right. > > John K Clark > >
What we call space *(x,y,z)* is just what we measure with a ruler. What we call time* t* is just what we measure with a clock. A space measurement = a ruler measurement. A time measurement = a clock measurement. That's all we know about space and time. - pt -- 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 everything-list+unsubscr...@googlegroups.com. To post to this group, send email to email@example.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.