There can be no such thing as a bad prompt from gpt3's perspective. A bad prompt is one where the user has a specific purpose which is not expressed. It's bad because you know beforehand that gpt3 can not align with it.
Someone pours grape juice into a bottle and becomes worried that is not safe to drink. GPT3 correctly grasps that there is a hidden context to this weird prompt, however when given no other information it guesses that this hidden context is something known only to the hypothetical character in the prompt. I would probably do this too.
When you give it the correct context (this weird prompt is a logic test) then it gives you the answer you expected.
That is interesting. How does it indicate its understanding that there is a hidden context?
Furthermore, I do not think we can assume that if it were trained on examples of satire or intentionally absurd text, it would perform better on such prompts - in fact, I would not be surprised if its performance would deteriorate on many prompts, both straightforward and tricky ones, if given such training.
Now I am wondering if you need a theory of mind before you can begin to understand satire...