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This non-implication, Form 86-alpha \( \not \Rightarrow \) Form 257, whose code is 4, is constructed around a proven non-implication as follows:

• An (optional) implication of code 1 or code 2 is given. In this case, it's Code 2: 10185, whose string of implications is: 40 \(\Rightarrow\) 86-alpha
• A proven non-implication whose code is 3. In this case, it's Code 3: 112, Form 40 \( \not \Rightarrow \) Form 260 whose summary information is:
  

  Hypothesis	Statement
  Form 40	<p> \(C(WO,\infty)\):  Every well orderable set of non-empty sets has a choice function. <a href="/books/2">Moore, G. [1982]</a>, p 325. </p>

  
  

  Conclusion	Statement
  Form 260	<p> \(Z(TR\&C,P)\): If \((X,R)\) is a transitive and connected relation in which every partially ordered subset has an upper bound, then \((X,R)\) has a maximal element. </p>

  
  
• An (optional) implication of code 1 or code 2 is given. In this case, it's Code 2: 9726, whose string of implications is: 257 \(\Rightarrow\) 260

The conclusion Form 86-alpha \( \not \Rightarrow \) Form 257 then follows.

Finally, the
List of models where hypothesis is true and the conclusion is false:

Name	Statement
\(\cal N33\) Howard/H\.Rubin/J\.Rubin Model	\(A\) is countably infinite;\(\precsim\) is a dense linear ordering on \(A\) without first or lastelements (\((A,\precsim) \cong (\Bbb Q,\le)\)); \(\cal G\) is the group of allorder automorphisms on \((A,\precsim)\); and \(S\) is the set of all boundedsubsets of \(A\)