On 29 January 2014 23:23, Bruno Marchal <[email protected]> wrote: > > Ah? I read his book on GR. It is a bit old but still pleasant. Not sure > that "our minds crawl up our worldlines" is wrong for block universe. Maybe > you can elaborate a little bit. >
It creates the wrong image for people who don't understand block time. They see it as the block universe sitting there, eternal and static, with our minds moving through it. But in what time could they be said to move? It can only be another time outside the one that is already embedded within the BU. The time we experience is (according to GR) a dimension in the 4D manifold. Seen from outside (which is impossible in practice, but we can draw diagrams of course), we are world tubes through a 4D space-time. From this perspective nothing is moving, and certainly not crawling along world-lines. One can see this by asking at what speed does something move along the time dimension? Maybe one year per year? But that gives a dimensionless result. Something's wrong! I will have to come back on the rest of your post... -- 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 post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/groups/opt_out.
