The following diagram shows that 14 \(\not \Rightarrow\) 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 406 \( \not \Rightarrow \) 391 is not just a code 6 non-implication, but is also a code 4 non-implication.
| 391 | This form is negation transferable | |||
| \(\Downarrow\) | ||||
| 112 | ||||
| \(\Downarrow\) | ||||
| 90 | ||||
| \(\Downarrow\) | ||||
| 317 | \( \not \Rightarrow \) | 118 | ||
| \( \Downarrow \) | ||||
| This form is transferable | 14 | |||
| \( \Downarrow \) | ||||
| 385 | ||||
| \( \Downarrow \) | ||||
| 406 |