The book itself is only meant to give a high-level summary of historical philosophical beliefs and thought structures. So, while it is not nearly detailed enough to be a textbook, it presents a lot of concepts very concisely. The jokes are generally used to illustrate concepts or perspectives.
The following joke is used to illustrate the concept of ding an sich, which means "thing in itself," and is supposed to describe an object as it is rather than how our senses perceive it.
Secretary: "Doctor, there's an invisible man in the waiting room."Another joke illustrates relativity of time.
Doctor: "Tell him I can't see him."
A snail was mugged by two turtles. When the police asked him what happened, he said, "I don't know. It all happened so fast."A final joke provides a rationale for why it is important to understand the purpose of law.
A judge calls the opposing lawyers into his chambers, and says, "The reason we're here is that both of you have given me a bribe." Both lawyers squirm in their seats. "You, Alan, have given me $15,000. Phil, you gave me $10,000."The only reason that I would hold back in recommending this book to anyone with a sense of humor is that it does contain some blue humor, though I do not think it is excessive. Other than that one thing, this book is perfect for anyone wanting to read up on serious philosophical ideas with a punchline.
The judge hands Alan a check for $5,000 and says, "Now you're even, and I'm going to decide this case solely on its merits."