On Tuesday, December 4, 2018 at 10:40:36 PM UTC-6, Philip Thrift wrote: > > > > > On Tuesday, December 4, 2018 at 4:50:22 PM UTC-6, Brent wrote: >> >> >> >> On 12/4/2018 11:50 AM, Philip Thrift wrote: >> >> >> >> On Tuesday, December 4, 2018 at 1:46:44 PM UTC-6, Brent wrote: >>> >>> >>> >>> On 12/4/2018 12:06 AM, Philip Thrift wrote: >>> >>> Can you give an example of "truth in the programming" and how it differs >>>> from the mathematical idea of true and the correspondence theory of truth? >>>> >>>> Brent >>>> >>> >>> >>> >>> Truth in programming follows the Brouwerian concept of truth: >>> [ https://plato.stanford.edu/entries/brouwer/ ] >>> >>> >>> >>> *There is no determinant of mathematical truth outside the activity of >>> thinking; a proposition only becomes true when the subject has experienced >>> its truth (by having carried out an appropriate mental construction); >>> similarly, a proposition only becomes false when the subject has >>> experienced its falsehood (by realizing that an appropriate mental >>> construction is not possible).* >>> >>> *There is no determinant of mathematical truth outside the activity of >>> computing;* a proposition only becomes true when the program has >>> produced its truth (by having carried out an appropriate computational >>> construction); similarly, a proposition only becomes false when the program >>> has produced its falsehood (by computing that an appropriate computational >>> construction is not possible). >>> >>> >>> I didn't ask for examples of circular definitions. >>> >>> Brent >>> >> >> >> >> In what sense is type theory circular logic? >> >> >> First, I didn't ask for a logic, I asked for examples to the different >> ideas of truth. Instead you provided some assertions about "where truth is >> determined" and about becoming true...which were circular. >> >> "a proposition only becomes* true* when the subject has experienced its >> *truth*" >> >> " a proposition only becomes *true* when the program has produced its >> *truth*" >> >> Third, neither your post nor the article on Brouwer said anything about >> type theory. >> https://plato.stanford.edu/entries/type-theory-intuitionistic/ >> >> Brent >> > > > The simple way to put it: > > Write a *Lisp* program *p*. > > If *p* returns nil, pi is false. > If *p* returns nil, *p* is false.
> > If *p *returns anything else, *p* is true. > > That's all you need to know about truth. > > - pt > -- 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 everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
