In Chapter 19 of 20 in his 2011 Capture Your Flag interview with host Erik Michielsen, author and leadership expert Simon Sinek shares the importance of differentiating friends from acquaintances. Sinek compares acquaintances sharing common interests, for example Facebook friends, from actual friends. When discussing a mutual connection, Sinek has learned to ask sharper questions to differentiate between the two to receive better context on an introduction or relationship. Simon Sinek is a trained ethnographer who applies his curiosity around why people do what they do to teach leaders and companies how to inspire people. He is the author of "Start With Why: How Great Leaders Inspire Everyone to Take Action". Sinek holds a BA degree in cultural anthropology from Brandeis University.