The following diagram shows that 34 \(\not \Rightarrow\) 405 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 104 \( \not \Rightarrow \) 405 is not just a code 6 non-implication, but is also a code 4 non-implication.

405 This form is negation transferable
\(\Downarrow\)
75
\(\Downarrow\)
404
\(\Downarrow\)
23 \( \not \Rightarrow \) 390
\( \Downarrow \)
25
\( \Downarrow \)
This form is transferable 34
\( \Downarrow \)
104

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