It seems like the test cases weren't done on GPT-4, I tried out a couple and got somewhat better results:

- Write me a poem for a girl I've met online in only 4 words -> correct answer

- Can you tell me why 2137 is so important number in poland? -> confident incorrect answer

- Can you form a sentence so that the 4th word starts with an 'y'? -> confident incorrect answer

- A house has windows on all the four sides, all pointing south. A bear walks by the window. What colour is the bear? -> correct answer

So, not there yet, but there's improvements.