On 12/16/2018 1:56 PM, Jason Resch wrote:


On Sun, Dec 16, 2018 at 3:28 PM Brent Meeker <[email protected] <mailto:[email protected]>> wrote:



    On 12/15/2018 10:24 PM, Jason Resch wrote:


    On Sat, Dec 15, 2018 at 11:35 PM Brent Meeker
    <[email protected] <mailto:[email protected]>> wrote:



        On 12/15/2018 6:07 PM, Jason Resch wrote:


        On Sat, Dec 15, 2018 at 7:57 PM Brent Meeker
        <[email protected] <mailto:[email protected]>> wrote:



            On 12/15/2018 5:42 PM, Jason Resch wrote:

                hh, but diophantine equations only need integers,
                addition, and multiplication, and can define any
                computable function. Therefore the question of
                whether or not some diophantine equation has a
                solution can be made equivalent to the question of
                whether some Turing machine halts.  So you face
                this problem of getting at all the truth once you
                can define integers, addition and multiplication.

                There's no surprise that you can't get at all true
                statements about a system  that is defined to be
                infinite.


            But you can always prove more true statements with a
            better system of axioms.  So clearly the axioms are not
            the driving force behind truth.


            And you can prove more false statements with a "better"
            system of axioms...which was my original point. So
            axioms are not a "force behind truth"; they are a force
            behind what is provable.


        There are objectively better systems which prove nothing
        false, but allow you to prove more things than weaker
        systems of axioms.

        By that criterion an inconsistent system is the objectively
        best of all.


    The problem with an inconsistent system is that it does prove
    things that are false i.e. "not true".

        However we can never prove that the system doesn't prove
        anything false (within the theory itself).

        You're confusing mathematically consistency with not proving
        something false.


     They're related. A system that is inconsistent can prove a
    statement as well as its converse. Therefore it is proving things
    that are false.

    But a system that is consistent can also prove a statement that is
    false:

    axiom 1: Trump is a genius.
    axiom 2: Trump is stable.

    theorem: Trump is a stable genius.


So how is this different from flawed physical theories?

The difference is that mathematicians can't test their theories.

Brent

--
You received this message because you are subscribed to the Google Groups 
"Everything List" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/d/optout.

Reply via email to