Ah, so it might have been a fluke. I took "4 out of 5" to be a ratio, but now I realize you mean just for this list.

You really should should re-ask it a few times to see. And then if it's not a fluke, try with a prng to see if the results are similar.

It may very well not be a ChatGPT thing, but an easily guessable thing just by stringing random numbers together.