I haven't tried in a while but at least previously you could completely flummox Gemini by asking it to come up with some plausible English words with no real known meaning; it just kept giving me rare and funny-sounding actual words and then eventually told me the task is impossible.

ChatGPT didn't have any issue when I recently asked something very similar.

https://chatgpt.com/share/6909b7d2-20bc-8011-95b6-8a36f332ac...