I am not seeing "neither/nor" in the question that you linked here, so I will create an example.
"Fish are neither mammals nor reptiles." I am able to diagram this with sufficient/necessary conditions because it is a general rule or principle.
F - - - - - -> not M and not R or M or R - - - - - -> not F
However, there are sentences for which I wouldn't diagram neither/nor. For example, "I am neither hungry nor tired." This might be an important premise, but it is not something that I would diagram by itself. It is just two things that I am not, and it doesn't lend itself to conditional reasoning.
Either/or is different, because there is conditionality involved. "I am either hungry or tired." There are conclusions that I can draw. not T - - - - - > H not H - - - - - -> T
Mehran goes over the either/or logic in detail in the sufficient and necessary video. If this last example doesn't make sense, I would watch that segment again.
ShirnelMarch 15, 2020
Great explanation. I know the question didn't have "neither/nor" in it, but thank you for explaining it. In looking at our example, it seems neither nor is diagrammed like a compound statement with the necessary condition negated. Is that the case?
