Rounding out this series of books, the fourth volume in Pratchett's set combines yet another humorous and crazy Discworld tale with real science and thought-provoking analyses of our world. This time there's even a trial, of sorts, as the ownership of Roundworld (aka our universe) comes under dispute.
More philosophical in nature than the other volumes, this is a book about thought and perception. It looks at a lot of science, but also delves into how the human ways of thinking have shaped our beliefs. From religion to how we interpret scientific facts, there's always the nagging feeling that certain questions simply don't have a "right" answer.
Conviction is closely explored as well as the book asks if things are a certain way because we've created specific rules to defend our point. Does G-d exist because we've got a book that says so or did we write the book to support a belief that something specific made our world? It's a valid question even as I have my own convictions. I realize that most people disagree about some topic or at some level, so how do you prove what you can only theorize about? You can't. Even with science, if it's just theoretical, you can craft any equation to support an opinion and label it as fact. That is, until someone else comes along with a different formula and completely changes the game.
It's a fascinating way to approach just about anything.
While all this heavy thinking is going on, we get a good dose of silly on Discworld. Pratchett takes these serious questions about proof and thought and belief and converts them into an argument about the ownership of Roundworld. Even though the professors of Unseen University know Roundworld is their creation, because they were there when the world began, a religious group is laying claim to the universe because it proves their belief that the world is round. Discworld is actually flat, and it's a known and verified fact, but that doesn't stop this group from daring to think differently.
Does believing in something give you ownership over it? That's an interesting question, and in the end the ultimate decider for whether Roundworld returns to its spot on an academic wizard's shelf or becomes a tangible symbol of an entire religion. It's also something to think about in relation to our own universe, which we can never actually understand since we can't see the big picture. What else is really out there? Can we even predict it? The conversation could continue infinitely, unlike the decision about Roundworld. That gets an exciting conclusion, one that even involves a decent chase.
Before reading this book, make sure you hit the series from the start. The books do reference each other.
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