Love is like the human appendix. You take it for granted while it’s there, but when it’s suddenly gone you’re forced to endure horrible pain that can only be alleviated through drugs.

*Appendix usually means “small outgrowth from large intestine,” but in this case it means “additional information accompanying main text.” Or are those really the same things? Think carefully before you insult this book.

Even if we have a reliable criterion for detecting design, and even if that criterion tells us that biological systems are designed, it seems that determining a biological system to be designed is akin to...