A. J. Jacobs, host of the "Hello Puzzlers" podcast, essayist, and the author of The Year of Living Biblically, The Know-It-All, It's All Relative and his latest, The Year of Living Constitutionally: One Man's Humble Quest to Follow the Constitution's Original Meaning (Crown, 2024), reports back on how AI is already woven into daily life with another take on being a "human guinea pig," going 48 hours without using AI.