On Tuesday, February 26, 2019 at 2:51:39 PM UTC-6, Brent wrote: > > > > On 2/26/2019 11:00 AM, Philip Thrift wrote: > > > > On Tuesday, February 26, 2019 at 12:43:49 PM UTC-6, Brent wrote: >> >> >> >> Right. Truth and existence are quite different things. >> >> Brent >> >> >> > For those from the type theory, programming language theory, constructive > mathematics (whatever that clumping of schools is called): > > Truth and existence are the same things. > > > So do those infer the existence of 2 and 4 from truth of 2+2=4? > > Brent >
Formulate arithmetic as a logic program and enter the query: ∃(X,Y):(X+X=Y) Then via backtracking it prints out: (X,Y) = (0,0) (1,2) (2,4) ... - 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 firstname.lastname@example.org. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.