another definition ... Laurence J. Peter

Expert: 

a man who makes 

three correct guesses

 consecutively. 

~Laurence J. Peter

Courtesy of the Library of Congresss

a moment with experts ... Robert Heinlein

Always listen to 

the experts. 

They'll tell you what

 can't be done and why. 

Then do it. 

~Robert Heinlein

Courtesy of Erin Enterprises