Due to the broad audience watching the talks, TED speakers generally take very complex ideas and boil them down into a simple engaging presentation. So when a white person finds out that you have a PhD and visits and attempts to engage you in a conversation about String Theory, you should know that all of their understanding comes from a twenty-minute talk they listened to while running on a treadmill. You should also be aware that the average white person considers their knowledge on the subject to be on par or superior to yours.