I was in a discussion forum and somebody asked me to explain The Texas Sharpshooter Fallacy. I started typing when i remembered a video from several years ago that will explain it better than i can write it.
Enjoy, my friend 🙂
Secrets of the Psychics – James Randi
Original broadcast: October 19, 1993
Description via PBS.org:
Can psychics predict the future? Many people seem to think so. Others argue that, in most cases, so-called psychic experiences are really misinterpretations of events. In this episode of NOVA, magician and confirmed skeptic James Randi challenges viewers to weigh the evidence for and against the existence of psychic phenomena.
Randi argues that successful psychics depend on the willingness of their audiences to believe that what they see is the result of psychic powers. The program highlights some of the methods and processes he uses to examine psychics’ claims. Using his own expertise in creating deception and illusion, Randi challenges specific psychics’ claims by duplicating their performances and “feats,” or by applying scientific methods. His goal is to eliminate all possible alternative explanations for the psychic phenomena. He also looks for evidence that they are not merely coincidental. His arguments can motivate your class to discuss the differences between psychic performances and legitimate cases of unexplained phenomena.
The Misconception: You take randomness into account when determining cause and effect.
The Truth: You tend to ignore random chance when the results seem meaningful or when you want a random event to have a meaningful cause.
Abraham Lincoln and John F. Kennedy were both presidents of the United States, elected 100 years apart. Both were shot and killed by assassins who were known by three names with 15 letters, John Wilkes Booth and Lee Harvey Oswald, and neither killer would make it to trial.
Spooky, huh? It gets better.
Lincoln had a secretary named Kennedy, and Kennedy had a secretary named Lincoln.
They were both killed on a Friday while sitting next to their wives, Lincoln in the Ford Theater, Kennedy in a Lincoln made by Ford.
Both men were succeeded by a man named Johnson – Andrew for Lincoln and Lyndon for Kennedy. Andrew was born in 1808. Lyndon in 1908.
What are the odds?
In 1898, Morgan Robertson wrote a novel titled “Futility.”
Written 14 years before the Titanic sank, 11 years before construction on the vessel even began, the similarities between the book and the real event are eerie.
The novel describes a giant boat called the Titan which everyone considers unsinkable. It is the largest ever created, and inside it seems like a luxury hotel – just like the as yet unbuilt Titanic.
Titan had only 20 lifeboats, half than it needed should the great ship sink. The Titanic had 24, also half than it needed.
In the book, the Titan hits an iceberg in April 400 miles from Newfoundland. The Titanic, years later, would do the same in the same month in the same place.
The Titan sinks, and more than half of the passengers die, just as with the Titanic. The number of people on board who die in the book and the number in the future accident are nearly identical.
The similarities don’t stop there. The fictional Titan and the real Titanic both had three propellers and two masts. Both had a capacity of 3,000 people. Both hit the iceberg close to midnight.
Did Robertson have a premonition? I mean, what are the odds?
In the 1500s, Nostradamus wrote:
Bêtes farouches de faim fleuves tranner
Plus part du champ encore Hister sera, En caige de fer le grand sera treisner, Quand rien enfant de Germain observa.
This is often translated to:
Beasts wild with hunger will cross the rivers, The greater part of the battle will be against Hister. He will cause great men to be dragged in a cage of iron, When the son of Germany obeys no law.
That’s rather creepy, considering this seems to describe a guy with a tiny mustache born about 400 years later. Here is another prophecy:
Out of the deepest part of the west of Europe, From poor people a young child shall be born, Who with his tongue shall seduce many people, His fame shall increase in the Eastern Kingdom.
Wow. Hister certainly sounds like Hitler, and that second quatrain seems to drive it home. Actually, Many of Nostradamus’ predictions are about a guy from Germania who wages a great war and dies mysteriously.
What are the odds?
If any of this seems too amazing to be coincidence, too odd to be random, too similar to be chance, you are not so smart.
You see, in all three examples the barn was already peppered with holes. You just drew bullseyes around the spots where the holes clustered together.
Allow me to explain.
Can you test psychic claims with science? Here are a few creative ways that you can test psychic powers scientifically as well as the results of these types of tests that have been performed hundreds of times over the last fifty years. This is part of my Exposing Psychics series.
By Mike McRae via ScienceAlert
Throughout history, there have been individuals who believe they’ve caught a sense of events yet to come.
True clairvoyance is unsupported by scientific evidence, but a subtle difference in how some people perceive the timing of events could help explain why many remain convinced of their psychic abilities.
A study by researchers from Yale University has provided some insight into why people think they have supernatural foresight, hinting at a physiological basis behind certain delusions.
The weight of evidence makes it fairly clear the human brain is not influenced by future events.
In many cases, proposed psychic abilities are the result of intentional fraud, with charlatans employing the same kinds of tricks mentalist magicians have used for centuries to feign mind reading and fortune telling.
But not all people who claim extraordinary abilities of future-sight are out to make a quick buck or two. Dismissing it as a sign of mental illness also tells us little about how such beliefs develop in otherwise healthy brains.
To gain an understanding of the neurological underpinnings of psychic prediction, the researchers made use of a test that had previously demonstrated a link between the timing of a colour changing shape, and the subject’s judgement of their ability to predict its transformation.
Only this time the researchers also evaluated the volunteers’ beliefs.
Continue Reading @ ScienceAlert – – –
Do you have precognition? If you’ve ever thought you might, you’re not alone. We all have experiences, at least every once in a long while, where it seems we’ve anticipated something a little too precisely for it to be random chance. Sometimes we anticipate things that are so specific, and so far outside the normal events we expect, that it seems there can be no explanation other than precognitive psychic powers. Might there be some undiscovered energy or force that makes such a thing possible? Today we’re going to look at your precognitive experiences, and see if there might be some other explanation.
First, it’s important to lay the groundwork for the conventional science-based explanation for apparent episodes of precognition. It comes from the law of large numbers. If we assume that something (anything) happens about once a second in your waking life, then statistically, you’re going to have a one-in-million experience about every month. Let’s take a look at the classic case as one example:
Hi Brian. At first, thank you for giving me the reasons and rationalities behind urban myths and superstition. I live in New Zealand and in 2015, my husband was on a business trip to Tokyo. On a Friday night, I dreamed about his funeral, no idea why, because he was a very healthy and happy man. The Saturday evening, my son called me that the police had come to tell him that they had found his father slumped next to his desk in his Tokyo hotel room. He had died the Friday night of a sudden heart attack. Due to the time difference between New Zealand and Japan, I must have had this dream at the same moment he died. I am not superstitious, but I hope you can give a reasonable explanation for my experience. Thank you, and keep up the good work.
Obviously this is an incomprehensible personal tragedy. Of course this listener has all our sympathies, but today we’re looking only at the statistical probability of what happened. I call this the classic case because it’s one of the most commonly reported cases that come to be described as psychic precognition: You dream of someone and then find out they died at that same time. But can it happen without psychic powers? Let’s calculate the probability of that.
Anyone with half a brain knows that Ouija Boards are total nonsense, but here is a great way to 100% prove they are nonsense, and best thing is anyone can try this!
by Gordon Bonnet via Skeptophilia
Hard-nosed science types like myself are often criticized by the paranormal enthusiasts for setting too high a bar for what we’ll accept as evidence. The supernatural world, they say, doesn’t come when called, is highly sensitive to the mental states of people who are nearby, and isn’t necessarily going to be detectable to scientific measurement devices. Also, since a lot of the skeptics come into the discussion with a bias toward disbelief, they’ll be likely to discount any hard evidence that does arise as a hoax or misinterpretation of natural phenomena.
Which, as I’ve mentioned before, is mighty convenient. It seems to boil down to, “It exists, and you have to believe because I know it exists.” And I’m sorry, this simply isn’t good enough. If there are real paranormal phenomena out there, they should be accessible to the scientific method. Such claims should stand or fall on the basis of evidence, just like any other proposed model of how things work.
The problem becomes more difficult with the specific claim of precognition/clairvoyance — the idea that some of us (perhaps all of us) are capable of predicting the future, either through visions or dreams. The special difficulty with this realm of the paranormal world is that a dream can’t be proven to be precognitive until after the event it predicts actually happens; before that, it’s just a weird dream, and you would have no particular reason to record it for posterity. And given the human propensity for hoaxing, not to mention the general plasticity of memory, a claim that a specific dream was precognitive is inadmissible as evidence after the event in question has occurred. It always reminds me of the quote from the 19th century Danish philosopher and writer, Søren Kierkegaard: “The tragedy of life is that it can only be understood backwards, but it has to be lived forwards.”
This double-bind has foiled any attempts to study precognition… until now.
I firmly believe in the importance of skeptics attending psychic shows, to see firsthand how the biggest touring psychics in the country claim to put audience members in touch with the spirits of their dearly departed – for entertainment purposes only, naturally. In seeing such shows up close and witnessing their effect on devoted audiences we get to see how seriously people take the word of a psychic, and therefore how serious an issue it is if the person making the claims doesn’t have the supernatural powers they profess.
One such show I recently attended was that of psychic Paula O’Brien, whose Liverpool show saw a modest audience of around 150 gather in a hotel function room, eager for Paula to make contact with the other side. Among the usual fare of scattergun names (“Is there a Stephen or a Stewart or a Scott?”) and random numbers and dates (“What does the number three or the month of March or the 3rd of any month mean?”) there were a few points that particularly stood out to a skeptical viewer.
Most disturbing was the lady who told Paula she had attempted suicide on two occasions since the death of her husband. Clearly this was a sensitive subject, and one which needed to be handled with care – or, ideally, left to qualified experts. All of which made Paula’s response shocking: “I promise you, if you try again – and this is your husband’s words – you’ll be in a wheelchair sucking through a straw.”
We then learned that the audience member in question had taken to smearing her deceased husband’s ashes on her skin before leaving the house, after being advised by another psychic that she should abandon her plans to scatter his ashes, and instead should keep them close at all times. It is hard to witness such cases and still wonder whether there is any harm in seeing a psychic.