This is my Part 1 of the review of Carl Sagan's book, Demon-Haunted World. This is more of my commentary rather than a review of the book.I have begun to realize how many posts on Facebook, Whatsapp, etc contains pseudoscience & misinformation. Few posts are easy to debunk. Magic water curing cancer is a no-brainer. However other posts are too meticulous to debunk. I thought it might be fruitful for me as a layman to learn critical & skeptical thinking from a famous astrophysicist, Carl Sagan. ..