The official site of bestselling author Michael Shermer The official site of bestselling author Michael Shermer

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The Fallacy of Excluded Exceptions

Why the singular of “data” is not “anecdote”

Scientific American (cover)

This column was first published in the November 2018 issue of Scientific American.

For a documentary on horror movies that seem cursed, I was recently asked to explain the allegedly spooky coincidences associated with some famous films. Months after the release of Poltergeist, for example, its 22-year-old star, Dominique Dunne, was murdered by her abusive ex-boyfriend; Julian Beck, who played the preacher “beast,” succumbed to stomach cancer before Poltergeist II’ s release; and 12-year-old Heather O’Rourke died months before the release of what would be her last starring role in Poltergeist III.

The Exorcist star Linda Blair hurt her back when she was thrown around on her bed when a piece of rigging broke; Ellen Burstyn was injured on set when flung to the ground; and actors Jack MacGowran and Vasiliki Maliaros both died while the film was in postproduction (their characters died in the film).

When Gregory Peck was on his way to London to make The Omen, his plane was struck by lightning, as was producer Mace Neufeld’s plane a few weeks later; Peck avoided aerial disaster again when he canceled another flight at the last moment (that plane crashed, killing everyone onboard); and two weeks after filming, an animal handler who worked on the set was eaten alive by a lion. (continue reading…)

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A Random Walk through Middle Land

How randomness rules our world and why we cannot see it, Part 2
magazine cover

Imagine that you are a contestant on the classic television game show Let’s Make a Deal. Behind one of three doors is a brand-new automobile. Behind the other two are goats. You choose door number one. Host Monty Hall, who knows what is behind all three doors, shows you that a goat is behind number two, then inquires: Would you like to keep the door you chose or switch? Our folk numeracy — our natural tendency to think anecdotally and to focus on small-number runs — tells us that it is 50–50, so it doesn’t matter, right?

Wrong. You had a one in three chance to start, but now that Monty has shown you one of the losing doors, you have a twothirds chance of winning by switching. Here is why. There are three possible three-doors configurations: (1) good, bad, bad; (2) bad, good, bad; (3) bad, bad, good. In (1) you lose by switching, but in (2) and (3) you can win by switching. If your folk numeracy is still overriding your rational brain (continue reading…)

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