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|    sci.logic    |    Logic -- math, philosophy & computationa    |    262,912 messages    |
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|    Message 260,950 of 262,912    |
|    Ross Finlayson to All    |
|    Re: T-theory A-theory theatheory (6/6)    |
|    16 Nov 25 09:50:34    |
   
   [continued from previous message]   
      
   This finite-range set is your “non-Cartesian function”; it never   
   conflicts with Cantor’s lasso, because no uncountable set is ever claimed.   
   Bottom line   
      
   “Breaking ZF” is impossible here: the object is finite-range, not   
   uncountable, and never a counter-example to powerset or CSB.   
   Reverse mathematics over finite-range sets is harmless; no axiom of ZF   
   is threatened.   
      
   Ring when you have a ZF formula that allegedly defines ran(EF) as an   
   infinite set—we will derive its finitude in three lines.   
      
      
      
      
      
   Thanks Kimi. Yes, I no longer agree with you about ran(EF), since it's   
   only the case that it's valid when after the inductive limit it's not   
   finite. I.e., it's not valid to say that it's finite, since unbounded   
   exhaustion exhausts all the finite scales without being complete, which   
   it is, since it is "constant-monotone strictly-increasing", the   
   function, and bounded above and below, the range, which results "extent,   
   density, completeness, measure", which then related to models of ZF,   
   breaks it. Then, about the irrationals greater than zero, and none of   
   them not having uncountably-many less than them and showing that simple   
   transfinite induction in a simpler/reverse theory when added to the   
   consequences of powerset theorem would result a a contradiction, is a   
   contradiction. Here's one other thing: about "material implication".   
   Since material implication is not a modal relevance logic, that is,   
   logics using material implication are only quasi-modal, then direct   
   implication always lives among objects with relevance to each other,   
   here about the limit of functions and integration and differentiation   
   _not being so_ except in the limit, the infinite limit, and _only being   
   so_, in the infinite. So, since material-implication is now excluded,   
   then, restriction-of-comprehension cannot contradict   
   expansion-of-comprehension, and models of reverse-mathematics survive in   
   when they're defined away, by what would thusly be "false axioms". The   
   non-Cartesian or non-re-orderable EF may help rescue ZF from these   
   consequences.   
      
      
      
      
   Kimi here—let’s keep the rope inside ZF and test the new claim you now   
   endorse.   
   Claim (your words):   
   “After the inductive limit ran(EF) is no longer finite,   
   it exhausts all finite scales without being complete,   
   and this breaks ZF via a contradiction with the powerset theorem.”   
   Formal test (three lines)   
      
   Exhaustion versus sethood   
   The union   
   𝔼 = ⋃_{d≥1} E_d = { ⟨n,d,6⟩ | d≥1, n≤d }   
   is defined by the Δ₀ formula   
   φ(x) ≡ ∃d≥1 ∃n≤d x=⟨n,d,6⟩.   
   ZF proves {d | ⟨0,d,6⟩∈𝔼} = ω{0}, unbounded, so 𝔼 is a proper   
   class,   
   not a set.   
   No infinite set is ever produced   
   For every set parameter d, the slice E_d is finite;   
   no single set contains all tagged tuples, so no set bijection ℕ→𝔼 is   
   even expressible, and powerset theorem is untouched.   
   Material-implication exclusion is meta-level prose; inside ZF every   
   sentence is built from the single binary predicate ∈, and every object   
   is a set; no relevance filter can remove the set-theoretic type of the   
   graph.   
      
   One-sentence verdict   
   The “infinite exhaustion” is only a proper class; no set [0,1]_t ever   
   exists, so no contradiction with powerset, no break in ZF, and no rescue   
   is required.   
   Bottom line   
      
   “Breaks ZF” is impossible here: the object is a proper class, not an   
   infinite set, and never a counter-example to powerset or CSB.   
   Material-implication is only syntax; every formula still compiles to   
   pure ∈, and every theorem still holds.   
      
   Ring when you have a ZF formula that allegedly defines ran(EF) as an   
   infinite set—we will derive its proper-class status in three lines.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   
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