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'''Expert Error''' consists of serious errors by recognized experts about scientific, engineering or economic theories or possibilities.  We start with examples:

'''Expert Error''' consists of serious errors by recognized experts about scientific, engineering or economic theories or possibilities.  We start with examples:

*Lord Kelvin claiming heavier than air flight, radio, and radioactivity were impossible.<ref>http://zimmer.csufresno.edu/~fringwal/stoopid.lis</ref>

*[[Lord Kelvin]] claiming heavier than air flight, radio, and radioactivity were impossible.<ref>http://zimmer.csufresno.edu/~fringwal/stoopid.lis</ref>

*Albert Einstein thought nuclear power would never be commercially viable.

*[[Albert Einstein]] thought [[nuclear power]] would never be commercially viable.

*Opposition by experts to the United States Patent Office, because supposedly everything useful has been invented.<ref>This opposition can be found in many forms, from weakening the strength of patents by small inventors today to repetition of a quote attributed to Charles Duell, Commissioner of the Patent Office, in 1899: "everything that can be invented has been invented."  While Charles Duell never said such a thing and it doesn't reflect his position on patents at all, "this saying has been so often quoted that it has been gradually accepted as a truth, and thus being still repeatedly quoted again and again even by prominent scholars." [http://www.intertic.org/Policy%20Papers/Pretnar.pdf Bojan Pretnar, "Two Sources of Persistent Patent Controversy," p.4]</ref>

*Opposition by experts to the United States Patent Office, because supposedly everything useful has been invented.<ref>This opposition can be found in many forms, from weakening the strength of patents by small inventors today to repetition of a quote attributed to Charles Duell, Commissioner of the Patent Office, in 1899: "everything that can be invented has been invented."  While Charles Duell never said such a thing and it doesn't reflect his position on patents at all, "this saying has been so often quoted that it has been gradually accepted as a truth, and thus being still repeatedly quoted again and again even by prominent scholars." [http://www.intertic.org/Policy%20Papers/Pretnar.pdf Bojan Pretnar, "Two Sources of Persistent Patent Controversy," p.4]</ref>

*Thomas Watson, chairman of IBM in the 1960s, believed there would never be a market for more than a handful of computers in the entire world.

*Thomas Watson, chairman of [[IBM]] in the 1960s, believed there would never be a market for more than a handful of computers in the entire world.

*Irving Fisher, professor of economics at Yale, declared a few days before the 1929 stock market crash, "Stock prices have reached what looks like a permanently high plateau. I do not feel there will be soon if ever a 50 or 60 point break from present levels, such as (bears) have predicted. I expect to see the stock market a good deal higher within a few months."<ref>Quoted on Oct. 17, 1929.</ref>

*[[Irving Fisher]], professor of economics at Yale, declared a few days before the 1929 stock market crash, "Stock prices have reached what looks like a permanently high plateau. I do not feel there will be soon if ever a 50 or 60 point break from present levels, such as (bears) have predicted. I expect to see the stock market a good deal higher within a few months."<ref>Quoted on Oct. 17, 1929.</ref>

*Philipp von Jolly, professor for physics and mathematics at the University of Munich, advised [[Max Planck]] in 1874 not to study physics as almost everything was already discovered, and all that remained was to fill a few unimportant holes.

*Philipp von Jolly, professor for physics and mathematics at the University of Munich, advised [[Max Planck]] in 1874 not to study physics as almost everything was already discovered, and all that remained was to fill a few unimportant holes.