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IntroDUCKtions “Weird Science” 2011 Thinking Critically About Weird Things

IntroDUCKtions “Weird Science” 2011 Thinking Critically About Weird Things. “teaching students to use uncommon sense to evaluate knowledge claims...”. John Donovan CAMCOR (Center for Materials Characterization in Oregon) donovan@uoregon.edu (541) 346-4632. “Uncommon Sense”. Knowledge:.

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IntroDUCKtions “Weird Science” 2011 Thinking Critically About Weird Things

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  1. IntroDUCKtions “Weird Science” 2011Thinking Critically About Weird Things “teaching students to use uncommon sense to evaluate knowledge claims...” John Donovan CAMCOR (Center for Materials Characterization in Oregon) donovan@uoregon.edu (541) 346-4632

  2. “Uncommon Sense” Knowledge: Justified belief or belief based on evidence • Useful (science, technology, medicine, etc.) • Fruitful (improved understanding, insight, avoidance of undesirable outcomes) • Valuable (advantage of information, get paid for your knowledge) Knowledge really is power! • Beautiful (complexity of universe, diversity of life, interconnectedness of systems)

  3. Over the last 15 years 90% of the rhinos have been killed by poachers who sell their horns on the black market. • “The Lancet today finally retracted the paper that sparked a crisis in MMR vaccination across the UK, following the General Medical Council's decision that its lead author, Andrew Wakefield, had been dishonest.” http://www.guardian.co.uk/society/2010/feb/02/lancet-retracts-mmr-paper • The CDC estimates that 463 children have died in the US from not being MMR vaccinated in the last 3 years So What’s Wrong With Being Wrong?

  4. ATSC (UK) Ltd ‘ADE "Advanced Detection Equipment" is said by its makers to be able to detect "all known drug and explosive based substances", using "non-vapour"methods. A simple plastic holder is fitted with a special piece of cardboard which has been prepared using "the proprietary process of electrostatic matching of the ionic charge and structure of the substance" to be detected. There is no power source or electronics - the device is said to be "charged" by the body of the user.’ http://www.theregister.co.uk/2010/01/22/dowsing_rod_bomb_detector_bust/ ‘The device works “on the same principle as a Ouija board” - the power of suggestion - said a retired United States Air Force officer, Lt. Col. Hal Bidlack, The Iraqi government has purchased more than 1,500 of the devices, known as the ADE 651, at costs from $16,500 to $60,000 each. Nearly every police checkpoint, and many Iraqi military checkpoints, have one of the devices, which are now normally used in place of physical inspections of vehicles.’ http://www.nytimes.com/2009/11/04/world/middleeast/04sensors.html

  5. Case Study: Homeopathy • First proposed by German physician Samuel Hahnemann in 1796 • “Like Cures Like” (observed that cinchona bark, used as a treatment for malaria, produced symptoms similar to malaria when ingested in overdose) • What substance does homeopathy claim to cure diaper rash? • 8X (or 10-8) is allowable concentration of arsenic in US water • 12X (or 10-12) is “a pinch of salt in the Atlantic Ocean” • 24X (or 10-24) has a 60% chance of containing one molecule per mole • 33X (or 10-33) dilution commonly seen in pharmacies and stores • 60X (or 10-60) Hahnemann recommended as “standard dose” • 100X (or 10-100) dilution for poison ivy “dose” (1080 atoms in universe) • 400X (or 10-400) dilution for popular flu remedy “Oscillococcinum” “Claims of homeopathy's efficacy beyond the placebo effect are unsupported by the collective weight of scientific and clinical evidence.” http://en.wikipedia.org/wiki/Homeopathy

  6. Impediments to teaching scholarship and critical evaluation of sources “The first principle is that you must not fool yourself and you are the easiest person to fool” Richard P. Feynman

  7. “Cherry Picking...” “...Arctic sea ice has returned to 1989 levels of coverage, and snowy, cold winters and cool summers have dominated northern North America and Europe" 2009, Harrison Schmitt Harrison Schmitt, Apollo Astronaut, 1972 "In fact, National Snow and Ice Data Center records show conclusively that in April 2009, Arctic sea ice extent had indeed returned to and surpassed 1989 levels." January 31 2011, Heartland Institute

  8. 1. We prefer stories to statistics • Units of deaths per billion • with one hour of risk exposure: • Giving This lecture: < 1 • Living where snakes are present: 3.8 • Rail or bus travel in USA: 10.0 • Child asleep in crib: 140 • Amateur Boxing: 450 • Climbing Stairs: 550 • Coal Mining: 910 • Hunting: 950 • Automobile Travel: 1200 • Air travel: 1450 • Cigarette Smoking: 2600 • Swimming: 3650 • Motorcycle riding: 6280 • Serving in Vietnam: 7935 • Canoeing: 10000 • Alpine Mountaineering: 40000 • Professional Boxing: 70000 • Giving Birth: 80000 • We prefer anecdotal/personal information • We evaluate risk non mathematically • We relate to emotional accounts

  9. “If a man is offered a fact which goes against his instincts, he will scrutinize it closely, and unless the evidence is overwhelming, he will refuse to believe it. If, on the other hand, he is offered something which affords a reason for acting in accordance to his instincts, he will accept it even on the slightest evidence. The origin of myths is explained in this way.” Bertrand Russell 2. We seek to confirm rather than question our beliefs • Pattern seeking animals • Behavioral biases

  10. 3. Misunderstanding the role of chance and coincidence • Lottery games • Casino games • Gambler’s fallacy • National Enquirer effect Statistically speaking, coincidences MUST occur sometimes!

  11. Are you paying attention?

  12. 4. Trusting the reliability of our senses • Distraction and hallucinations are common • Perception is influenced by expectation

  13. Are You Hallucinating Yet?

  14. Are squares A and B the same shade of gray?

  15. 5. We oversimplify our thinking and trust our instincts too easily... • Evolution of accurate, reliable (economical) behavior, although imperfect and fallible... • Cognition is faulty (much more than we’d like to believe)...

  16. pareidolia a psychological phenomenon involving a vague and random stimulus (often an image or sound) being perceived as significant

  17. 6. Inability to grasp magnitudes/properties outside of evolutionary historical experience • Deep space • Deep time • Deep size

  18. 50% of American adults think that the world is around 10,000 years old! How much of an error is that? It’s like believing that the distance from New York to Los Angeles is 30 feet. Assume 13.7 billion years = 1 year, then: January 1st = Big bang 26th = first galaxies form September 1st = Solar system forms 21st = first stirrings of life November 8th = first oxygen atmosphere 30th = first sex by algae December 15th = multi-cell life 19th = algae on land 21st = land animals (millipedes) 25th = dinosaurs 30th = mammals (rodents) 31st 1:00 AM = early apes 10:30 PM = stone tools 11:54 = homo sapiens 11:59:37 = agriculture 11:59:57 = zero invented 11:59:59 = Copernicus

  19. Quantum dots

  20. What was that again? • "Fooling around with alternating current is just a waste of time. Nobody will use it, ever." -Thomas Edison, 1889 • "Airplanes are interesting toys, but of no military value." - Marechal Ferdinand Foch, Professor of Strategy, Ecole Superieure de Guerre • "Louis Pasteur's theory of germs is ridiculous fiction." -Pierre Pachet, Professor of Physiology France, 1872 • "The energy produced by the atom is a very poor kind of thing. Anyone who expects a source of power from the transformation of these atoms is talking moonshine." -Ernst Rutherford, 1933 • "Space travel is bunk" - Sir Harold Spencer Jones, Astronomer Royal of Britain, 1957, two weeks before the launch of Sputnik “No one will ever need more than 640K of RAM” -Bill Gates, 1981

  21. Results From Science: • All knowledge claims are tentative and subject to revision given new evidence. Evidence that attempts to falsify our current beliefs! • Science does not prove its claims-yet it is widely agreed that scientific claims are more trustworthy than other kinds of claims. • Scientific knowledge is reliable knowledge, but individual scientists are not infallible! • The strength of science lies in the way that its theories are put up for falsification, and are continually being modified and improved in accuracy. This is a good thing... • A scientific theory is not accepted until it has been battle-tested by a skeptical scientific community. “Just a theory”... that you can bet your life on!

  22. Thank-you! John Donovan Freshman Seminar CH199 “Weird Science” Winter quarter XKCD.COM Let’s face it, science isn’t “natural”! But it sure is darn useful...

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