Leave it off to give myself some additional cognitive space. If my battery saver kicks on I start paying more attention, or if I see a chunk a missing I know I should probably set to charge later.

Nobody likes being pointed at. The fist point, then, is a way to underscore an important point without the scolding, accusatory associations of a raised index finger—because it uses a thumb instead. Clinton Thumb works best when paired with an intellectually complex point, making it a TED talk favorite. “It is articulating that you’re focusing on something, and that you’re grasping it cognitively,” body language expert Joe Navarro told Business Insider.