The following diagram shows that 88 \(\not \Rightarrow\) 21 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 140 \( \not \Rightarrow \) 21 is not just a code 6 non-implication, but is also a code 4 non-implication.
| 21 | This form is negation transferable | |||
| \(\Downarrow\) | ||||
| 23 | ||||
| \(\Downarrow\) | ||||
| 151 | ||||
| \(\Downarrow\) | ||||
| 122 | ||||
| \(\Downarrow\) | ||||
| 333 | \( \not \Rightarrow \) | 250 | ||
| \( \Downarrow \) | ||||
| This form is transferable | 88 | |||
| \( \Downarrow \) | ||||
| 140 |