All great points, but I never say "I don't know" if I actually know an answer. I've always provided answers to my kids (both biological and students I've taught

All great points, but I never say "I don't know" if I actually know an answer. I've always provided answers to my kids (both biological and students I've taught) if I know the answer. It often then stimulates further discussion and can lead to even more complex questions. As an example, my son often asks me scientific questions, and I provide the answers, and we talk a little around the subject. Eventually he stumped me though, when he asked if you were travelling at the speed of light would you cast a shadow. At that point I actually had to say "I don't know" and we ended up asking Twitter for an answer, and we both learned something. https://twitter.com/Coding2Learn/status/715247765547270144 https://twitter.com/Coding2Learn/status/715247765547270144