The following diagram shows that 10 \(\not \Rightarrow\) 391 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 80 \( \not \Rightarrow \) 391 is not just a code 6 non-implication, but is also a code 4 non-implication.

391 This form is negation transferable
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399
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323
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62
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61
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11
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12
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336-n
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133 \( \not \Rightarrow \) 64
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This form is transferable 10
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80

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