# Re: Mathematical Universe Hypothesis

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On 11/1/2018 4:02 PM, Philip Thrift wrote:
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On Thursday, November 1, 2018 at 4:02:56 PM UTC-5, Brent wrote:

On 11/1/2018 11:59 AM, Philip Thrift wrote:
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On Thursday, November 1, 2018 at 1:44:19 PM UTC-5, John Clark wrote:

On Thu, Nov 1, 2018 at 2:27 PM Philip Thrift
<cloud...@gmail.com> wrote:

/> infinite time Turing machines are more powerful than
ordinary Turing machines/

That is true, it is also true that if dragons existed they
would be dangerous and if I had some cream I could have
strawberries and cream, if I had some strawberries.

/> How  "real" you think this is depends on whether you
are a *Platonist *or a*fictionalist*./

No, it depends on if you think logical contradictions can
exist, if they can then there is no point in reading any
mathematical proof and logic is no longer a useful tool for
anything.

John K Clark

Of course logics are fiction too. (They're just languages after all.)
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OK.  Sentences written down are physical and not fictions. But can
propositions.  But this must be a relation between a proposition

Brent

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Sentences, like this one, are physical *only* in the sense that they are (in this case) made up of electronic bits displayed on a screen (as you are looking at right now, maybe on a laptop or smartphone) - or they could be made up of ink strokes on paper, etc.
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One can't read anything more into them physically that that. What one reads out of them (a person looking at this sentence, or a computer scanning one) is a difference matter.
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There are no abstractions in an immaterial sense.
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But there are abstractions in the sense that the same proposition is instantiated in different substrates.   So the contradiction can be between different instances, e.g. a spoken sentence can contradict a written one.
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Brent

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