• The strength of a theory is not what it allows, but what it prohibits; if you can invent an equally persuasive explanation for any outcome, you have zero knowledge.

    Eliezer Yudkowsky: The strength of a theory is not what it allows, but what it prohibits; if you can invent an equally persuasive explanation for any outcome, you have zero knowledge.
    "An Alien God" by Eliezer Yudkowsky, lesswrong.com. November 2, 2007.