The following diagram shows that 31 \(\not \Rightarrow\) 349 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 249 \( \not \Rightarrow \) 349 is not just a code 6 non-implication, but is also a code 4 non-implication.

23 \( \not \Rightarrow \) 349 This form is negation transferable
\( \Downarrow \)
27
\( \Downarrow \)
This form is transferable 31
\( \Downarrow \)
32
\( \Downarrow \)
10
\( \Downarrow \)
249

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