The following diagram shows that 8 \(\not \Rightarrow\) 255 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 421 \( \not \Rightarrow \) 255 is not just a code 6 non-implication, but is also a code 4 non-implication.
| 255 | This form is negation transferable | |||
| \(\Downarrow\) | ||||
| 260 | ||||
| \(\Downarrow\) | ||||
| 40 | ||||
| \(\Downarrow\) | ||||
| 113 | \( \not \Rightarrow \) | 43 | ||
| \( \Downarrow \) | ||||
| This form is transferable | 8 | |||
| \( \Downarrow \) | ||||
| 421 |