The keynote from Andrew Ruef at @REverseConf on how we (humans) use tools was one of the most thought-provoking talks I've heard in a while.

Core idea: when we use tools, it changes how we perceive the world, to include making the tool part of ourselves.

Like if you use a fork to eat, you don't think "I used the fork I held in my hand to put food in my mouth", you think "I put the food in my mouth."

Really cool thoughts on RE and practical advice for tool makers all in one talk.