OpenAI GPT fail
I was having a discussion with someone about AI earlier and ChatGPT. He claims it can solve simple problems 100% of the time. So I set it a basic question, while we sat chatting in the local bar!
I asked:
Mary has two sisters. Her sister, Joy, has two brothers. How many brothers does Mary have?
And the response:
Mary has one brother.
Here's the reasoning:
Mary has two sisters.
Joy, one of Mary's sisters, has two brothers.
Since Joy is one of Mary's sisters, the two brothers that Joy has must also be Mary's brothers.
Thus, Mary has one brother
The reasoning is all correct, but the final conclusion does not follow the reasoning.
If it's not clear: Mary actually has 2 brothers; the same as her sister Joy!
The results were from GPT-4o. If I use GPT-41 if gets it correct.