Re: GR1916, available online.

Alen wrote:
[...] we appear
to have the problem of an unvisualisable manifold.
[...] this appears to be
impossible to visualise. [...] I think, nevertheless, that the severe
problems involved in any attempt to visualise the
pre-existing gravitational manifold should be taken
seriously, [...]

Do you seriously think that nature cares about your personal abilities (or lack thereof)? Is there ANY reason that the world and its underlying mechanisms must be "visualizable" to humans?

If there is no such constraint on nature, then there is no such constraint on valid physical theories.


Tom Roberts
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