The following diagram shows that 79 \(\not \Rightarrow\) 390 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 306 \( \not \Rightarrow \) 390 is not just a code 6 non-implication, but is also a code 4 non-implication.
| 147 | \( \not \Rightarrow \) | 390 | This form is negation transferable | |
| \( \Downarrow \) | ||||
| 91 | ||||
| \( \Downarrow \) | ||||
| This form is transferable | 79 | |||
| \( \Downarrow \) | ||||
| 203 | ||||
| \( \Downarrow \) | ||||
| 306 |