Jon Udell, November 1, 2000 in "Tangled in the Threads - Are servers obselete?"
via: http://udell.roninhouse.com/bytecols/2000-11-01.html

[...] Assuming is dangerous. Very dangerous. If my professional career has taught me anything it is that even problems that look simple at first can be hard or even impossible to solve. Never ever assume that a problem is manageable before you have analyzed it and know of a working solution. Innocent-looking problems can turn out to be monsters. [...]