If a major goal in science is to “Keep It Simple,” what exactly does “simple” mean in this context? Helpful? Useful? Easy to Understand? Should public money only be spent on research that can be explained to folks down at the local pub? Does simplification naturally lead to overgeneralisation? Should the media “keep it simple” when communicating scientific results to the public? The curse of knowledge is clearly operating here. How much does the average person actually know (or need to know) about seemingly simple everyday objects like a zipper, lock, or toilet? What about cognitive explanations about “simple” species like bees, fish, or birds? Are simple explanations ideal in the judgements and decisions that we make everyday? Reading: Mindware by Richard Nisbett, “KISS and Tell.” Guests: Jason Tangen, Rachel Searston, Ruben Laukkonen, Gianni Ribeiro, Jeremy Nash, and Ryan Metcalfe. Learn more at think101.org.