Ethos: Alignment
Logos: Action depending on alignment
Pathos: Consequence of Action.
Did you even take an argument class?
Ethos: An argument based on Ethical values. (such as the rules or laws.)
Logos: An argument based on Logical values.
Pathos: An argument based on emotional values.
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No.
By this logic; do you need a class in DnD to play DnD?
No.
We can throw as much hypothetical scenarios as you want, but logic dictates that they are invalid. You would have to re-work fundamental laws in society and social norms. If you have a hypothetical scenario that does not change this, then the hypothetical scenario is false and invalid.
EDIT:
In my opinion, creating hypothetical situations for the sake of seeing what happens is folly. Why worry if we are not facing that situation.