On 9/14/2017 5:01 AM, Bruno Marchal wrote:
On 14 Sep 2017, at 13:22, ronaldheld wrote:
This should cause some discussion. Maybe belongs in the "is math
real" thread, but that one is large??
Ronald
What is your opinion?
The author believes that PI does not existed 100,000 years ago.
It looks like he believes that 100,000 existed 100,000 years ago,
making hard for me to understand why PI would not exist, and in which
sense, as PI is not a function of time.
That's just snark. There's nothing to indicate he thinks 100,000
existed 100,000yrs ago.
Then the author seems to believe in a primary physical universe, and
does not seem aware that this is an assumption too, and indeed
arguably much stronger than assuming arithmetic.
He doesn't say anything about "primary" physical universe. Every time
someone "assumes" a physical universe, you claim they are assuming a
"primary" physical universe. This doesn not follow at all. First, he
isn't assuming a physical universe - he's observing it. He is arguing
that assuming arithmetic, and the rest of mathematics, is the stronger
assumption.
The main problem is that the author does not put its assumption on the
table, and take for granted that existence is physical existence.
Observation is the antithesis of "taking for granted".
That does not make sense with mechanism (probably), but to be franc, I
am not sure this makes sense even without mechanism. He confuses also
mathematical theory and mathematical reality, it seems.
What do *you* think? What would be your primary assumption?
My feeling is that it is a waste of time to guess what exists or not
before saying what we are willing to assume as primitively true, or
what is the metaphysical background accepted.
That's because you're a theologian at heart and want to start with a god.
Brent
Bruno
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<1709.03087.pdf>
http://iridia.ulb.ac.be/~marchal/ <http://iridia.ulb.ac.be/%7Emarchal/>
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