Upon rereading the thread and all of its comments, I suspect the person I originally quoted meant something along the lines of “preferring 1A to 1B but 2B to 2A is irrational”, which seems more defensible.
There is nothing irrational about preferring 1A and 2B by themselves, it’s choosing the first option in the first scenario and the second in the second that’s dodgy.
Upon rereading the thread and all of its comments, I suspect the person I originally quoted meant something along the lines of “preferring 1A to 1B but 2B to 2A is irrational”, which seems more defensible.
There is nothing irrational about preferring 1A and 2B by themselves, it’s choosing the first option in the first scenario and the second in the second that’s dodgy.