Expert Blindness

Expert Blindness, and Knowledge Blindness, both refer to the things that people who are knowledgeable can’t see because they can’t experience what it’s like not to know: such as what words beginners don’t understand, distinctions that non-experts can’t discriminate and appreciate, and implications  that are dependent on advanced knowledge. Experts know everything except what it's like to know nothing.

An example of knowledge blindness is the person who gave a friend of mine driving directions. “Drive down to the corner where the bank used to be, and make a right.”

In marketers, this is extremely prevalent in product descriptions. People do not realize that new customers  do not understand even the most rudimentary terminology.

What are some of your favorite examples of Knowledge or Expert Blindness?