The following diagram shows that 14 \(\not \Rightarrow\) 239 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 311 \( \not \Rightarrow \) 239 is not just a code 6 non-implication, but is also a code 4 non-implication.

239 This form is negation transferable
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427
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67
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89
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90
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51
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77
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185
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317 \( \not \Rightarrow \) 84
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This form is transferable 14
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311

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