Bahlool’s Challenge: The Astrologer Who Knew Nothing

A man claimed in front of Caliph Harun al-Rashid that he knew the science of astrology. Bahlool was present at the gathering and asked, “Do you know who lives next to you?”
The man replied, “No, I don’t.”
Bahlool said, “You don’t even know your neighbor, but you claim to know the stars in the sky?”