I don't disagree with any of the above posts.
I see it in terms of political correctness. What is "right" and what is "wrong".
Fe looks externally to see what is "right" and "wrong" in order to affect internal perception and Fi creates it internally from external perception.
Logic does not recognize right and wrong or ethics of any kind so there is essentially nothing logical about Fi and Fe but I do think there is plenty of rationality within them as long as they are used appropriately and with moderation.