Expert information. It in no way assures that the author of that site or blog is an expert. Some characteristics of the development of an expert have been found to include Mark Twain defined an expert as "an ordinary fellow from another town". Will Rogers described an expert as "A man fifty miles from home with a briefcase." Danish scientist and Nobel laureate Niels Bohr defined an expert as "A person that has made every possible mistake within his or her field." Malcolm Gladwell describes expertise as a matter of practicing the correct way for a total of around 10,000 hours.
Konrad Kellen name. He lived in retirement in Los Angeles, dying at his home in Pacific Palisades. Terrorism expert Brian Jenkins said Kellen often took a contrarian or independent view among RAND Corporation colleagues. In 2013, six years after Kellen's death, journalist and author Malcolm Gladwell noted Kellen's life and career were based on his ability to listen, citing him as "a truly great listener" for his ability to listen without filtering what he heard through the biases of the times. Konrad Kellen Konrad Kellen (born "Konrad Moritz Adolf Katzenellenbogen"; December 14, 1913 – April 8, 2007) was a German-born American political