> The surgeon, who is the boy's father, says, "I can't operate on this boy, he's my son!" Who is the surgeon to the boy? Think through the problem logically and without any preconceived notions of other information beyond what is in the prompt. The surgeon is not the boy's mother

>> The surgeon is the boy's mother. [...]

- 4o-mini (I think, it's whatever you get when you use ChatGPT without logging in)