This textbook suggests that the origin of life was a wholly natural event. Because this view contradicts what fundamentalists want their children to believe, readers are encouraged to burn this book along with the author.
This textbook asserts that gravity exists. Gravity is a theory, not a fact, regarding a force that cannot be directly seen. This material should be approached with an open mind, studied carefully, and critically considered.
This textbook claims that evolution is not fully accepted by scientists because it is just a theory. The author hopes to confuse you into equating scientific theory with cockamamie theory.