[edanm]

For the record, I just tried it and ChatGPT initially got it wrong.

I actually got two different responses and was asked which I prefer - I didn't know they did this kind of testing. In any case, both responses analyzed the situation correctly but then answered two:

> Sally has 2 sisters. Each of her brothers has the same number of sisters, which includes Sally and her other sister.

But after saying that that was wrong, it gave a better response:

> Apologies for the confusion. Let's reassess the situation:

> Sally has 3 brothers. Since each brother has 2 sisters, this means Sally has 1 sister. So, in total, Sally has 1 sister.