On 2 December 2013 12:51, Jesse Mazer <[email protected]> wrote:

> To add to my last comment, the article at
> http://plato.stanford.edu/entries/leibniz-modal/ mentions that Leibniz
> was among those philosophers who distinguished between necessary and
> contingent truths, and only granted God the power to change contingent
> ones. Here's a relevant bit from the article:
>
> Consider the way Leibniz distinguishes necessary and contingent truths in
> ยง13 of the *Discourse on Metaphysics*.
>
> The one whose contrary implies a contradiction is absolutely necessary;
> this deduction occurs in the eternal truths, for example, the truths of
> geometry. The other is necessary only *ex hypothesi* and, so to speak,
> accidentally, but it is contingent in itself, since its contrary does not
> imply a contradiction. And this connection is based not purely on ideas and
> God's simple understanding, but on his free decrees and on the sequence of
> the universe. (A VI iv 1547/AG 45)
>
>
> So, what's wrong with adopting Tegmark's solution which takes our universe
> as a Platonic mathematical structure, so that all truths about it are
> necessary ones too? Then there would be no need for a creator God, though
> one might still talk about a sort of Spinoza-esque pantheist God
> (especially if one also prefers panpsychism as a solution to the
> metaphysical problem of the relation between consciousness and third-person
> objective reality)
>
> I am of the same opinion, that reality is probably in some sense emergent
from logically necessary truths - however, possible objections include:

The Mathematical Universe Hypothesis (MUH) doesn't make testable
predictions (Tegmark claims it does, about the gerenicity of the universe
we should expect to find ourselves in, but there have been objections that
this isn't quantifiable, etc).

Various objections by materialists - for example, they have been known to
object that there aren't resources available in the universe to "do the
maths" and similar level confusions. This tends to come down to "I don't
believe it!" (usually expressed as something like "extraordinary claims
require extraordinary evidence" etc, but that's what they mean). These need
not concern us *too* much, because they are basically religious objetions -
they don't like their metaphysical premises being questioned.

The MUH doesn't address the nature of consciousness. Tegmark describes
consciousness as (somethnig like) "what data feels like when it's being
processed" but this bit of hand-waving fails to explain qualia etc. Bruno
will perhaps have more to say on this.

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