Assignment Versus Equality

[Gregory Ewing]

Marko Rauhamaa wrote:

>        ----------
>       /          \
>      /  (almost)  \ N
>     |    black     ||
>     |     hole     |S
>      \            /
>       \          /
>        ----------
> 
> 
>            /
>           / compass needle
>          /
> 
> The compass needle shows that the probe is "frozen" and won't budge no
> matter how long we wait.

All your experiment shows is that the last information we had
about the magnet is that it was nearly stationary just above
the horizon.

It doesn't prove that the probe itself is frozen, any more than
the fact that a photograph you took of something last month
doesn't move proves that the object you photographed is
stuck in the state it was in a month ago.

Keep in mind that changes in the magnetic field propagate at
the speed of light and are subject to the same redshift, etc.
as any other signal. It doesn't matter whether you use a
permanent magnet, an electric charge, or coconuts banged
together in morse code, relativity still applies.

--
Greg