GPT is really good at repeating what the average intelligent response to something might look like, but it doesn't seem to be actually reasoning about any of its responses. Give it a complex logical problem that it needs to deduce from inputs, such as which foods contain gluten, based on their ingredient lists, and it will reliably fail. As a person with celiac, this is a task I complete multiple times a day with no effort. Just today I was trying to build a prompt that would summarize daily news updates leaving out anything about Russia, but it still included Russia more often than not despite being very clear in the prompt that anything about Russia should not being included in the response under any circumstances.