I tried this prompt

>I want you to play a game of 20 questions with me. You will ask me questions, one at a time, to try and determine which animal I am thinking of. You will use my answers to inform your next question. You can guess the animal I am thinking of at any time, but you must make a guess after your twentieth question.

It appeared to break at question 7, but it might be experiencing high usage at the moment.