BS 168 is an interview with psychologist Cecilia Heyes from Oxford University in the UK. We talk about her fascinating book "Cognitive Gadgets: The Cultural Evolution of Thinking." Our focus is on exploring the evidence that several cognitive skills that appear to be unique to humans are learned from other people rather than being inherited genetically as is often assumed. The proposal that language is a cognitive gadget NOT a cognitive instinct is controversial and has very important implications.