The following diagram shows that 31 \(\not \Rightarrow\) 334 is a code 6 non-implication, and the theory of transferability then shows that it is actually a code 4. It follows that the non-implication 423 \( \not \Rightarrow \) 334 is not just a code 6 non-implication, but is also a code 4 non-implication.

334 This form is negation transferable
\(\Downarrow\)
67
\(\Downarrow\)
126
\(\Downarrow\)
82
\(\Downarrow\)
83
\(\Downarrow\)
23 \( \not \Rightarrow \) 64
\( \Downarrow \)
27
\( \Downarrow \)
This form is transferable 31
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32
\( \Downarrow \)
10
\( \Downarrow \)
423

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