The origin of all science is in the desire to know causes; and the origin of all false science and imposture is in the desire to accept false causes rather than none; or, which is the same thing, in the unwillingness to acknowledge our own ignorance.
-William Hazlitt, attacking phrenology.
This quote is itself an example of the phenomenon it describes since it stems from a desire to be able to separate true from false science without the hard and messy process of looking at the territory.
Also hindsight bias.
Here's the new thread for posting quotes, with the usual rules: