The following diagram shows that 185 \(\not \Rightarrow\) 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 84 \( \not \Rightarrow \) 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
\(\Downarrow\)
89 \( \not \Rightarrow \) 390
\( \Downarrow \)
90
\( \Downarrow \)
51
\( \Downarrow \)
77
\( \Downarrow \)
This form is transferable 185
\( \Downarrow \)
84

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