Moeller: Some people apply skepticism automatically, some don’t. Some can handle change, others not so much. My philosophy is you don’t know what you don’t know and if you were ever right in a given moment, and if your guesses were ever true it would be serendipitous. You must attack your assumptions at all times. My basic tenet: question yourself, because the world is ever-changing.

(Excerpt from The Entrepreneur's Guide To Customer Development)

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