Carl Sagan’s Baloney Detection Kit

  1. Wherever possible there must be independent confirmation of the “facts.”
  2. Encourage substantive debate on the evidence by knowledgeable proponents of all points of view.
  3. Arguments from authority carry little weight — “authorities” have made mistakes in the past. They will do so again in the future. Perhaps a better way to say it is that in science there are no authorities; at most, there are experts.
  4. Spin more than one hypothesis. If there’s something to be explained, think of all the different ways in which it could be explained. Then think of tests by which you might systematically disprove each of the alternatives. What survives, the hypothesis that resists disproof in this Darwinian selection among “multiple working hypotheses,” has a much better chance of being the right answer than if you had simply run with the first idea that caught your fancy.
  5. Try not to get overly attached to a hypothesis just because it’s yours. It’s only a way station in the pursuit of knowledge. Ask yourself why you like the idea. Compare it fairly with the alternatives. See if you can find reasons for rejecting it. If you don’t, others will.
  6. Quantify. If whatever it is you’re explaining has some measure, some numerical quantity attached to it, you’ll be much better able to discriminate among competing hypotheses. What is vague and qualitative is open to many explanations. Of course there are truths to be sought in the many qualitative issues we are obliged to confront, but finding them is more challenging.
  7. If there’s a chain of argument, every link in the chain must work (including the premise) — not just most of them.
  8. Occam’s Razor. This convenient rule-of-thumb urges us when faced with two hypotheses that explain the data equally well to choose the simpler.
  9. Always ask whether the hypothesis can be, at least in principle, falsified. Propositions that are untestable, unfalsifiable are not worth much. Consider the grand idea that our Universe and everything in it is just an elementary particle — an electron, say — in a much bigger Cosmos. But if we can never acquire information from outside our Universe, is not the idea incapable of disproof? You must be able to check assertions out. Inveterate skeptics must be given the chance to follow your reasoning, to duplicate your experiments and see if they get the same result.

This article is interesting and full of common sense. These tools don’t only apply for scientists but can be used in everyday life to avoid deception and manipulation. Read the complete article on Brain Pickings.






4 thoughts on “Carl Sagan’s Baloney Detection Kit

  1. Danny the Dog January 22, 2017 / 6:51 pm

    Too bad Sagan didn’t follow his own advice. He was married to scientific dogma as much as any of his peers. I heard him time and time again state that the speed of light was the cosmic speed limit when it had be proven many times (in his lifetime) that, that was not true. Ever hear of a quantum leap?


    • sleepygirl2 January 22, 2017 / 7:41 pm

      He may not have followed his own advice but it’s still good advice.


  2. noelleg44 January 22, 2017 / 7:27 pm

    Good advice indeed for these times, with so many people believing that THEY know what’s good for everyone else. Carl Sagan could indeed be dogmatic, but he stimulated a lot of men and women to look to the stars. “Ah, but a man’s reach should exceed his grasp, Or what’s a heaven for? “


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