On why stateful code is bad

gistfile1.txt

STUDENT: Sir, can I ask a question?
TEACHER: Yes!
STUDENT: How do you put an elephant inside a fridge?
TEACHER: I don't know.
STUDENT: It's easy, you just open the fridge and put it in. I have another question!
TEACHER: Ok, ask.
STUDENT: How to put a donkey inside the fridge?
TEACHER: It's easy, you just open the fridge and put it in.
STUDENT: No sir, You just open the fridge take out the elephant and put it in.
TEACHER: Ooh...ok!!
STUDENT: Let me ask another one. If all the animals went to the lion'sbirthday party, and one animal went missing which one would it be?
TEACHER: The lion of course! Because it would eat all the animals.
STUDENT: No sir, it is the donkey, because it's still inside the fridge.
TEACHER: Are you kidding me?
STUDENT: No sir, 1 last question.
TEACHER: Ok!
STUDENT: If there's a river known to be full of crocodiles and you wanted to cross, how would you?
TEACHER: There's no way, I would need a boat to cross.
STUDENT: No sir, you just swim and cross it because all the animals went to the lion's birthday party.