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6/15/2018

Revisiting the Exploits of the Oracle of Oberhausen: Paul the Psychic Octopus

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Excitement was in the air as the world was once again struck with World Cup fever, and the teams from 32 nations competed in Russia to decide who would be the world soccer champion. In the final France defeated Croatia to claim the title for the second time. However, rather than write about the science behind soccer, today I want to revisit the exploits of Paul, an unassuming octopus who dwelled in a tank at the Sea Life Center in Oberhausen, Germany, and who correctly predicted the outcome of 8 consecutive World Cup games back in 2010.

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It all started during the 2008 matches for the European Soccer Cup. In what was a publicity stunt for the aquarium, Paul's keepers began introducing into his tank 2 plastic boxes each containing a tasty mussel. The boxes with lids that the octopus could open had the flag of the German team on one of them and the flag of the opposing team on the other. The idea was that the box that Paul opened first would be the winner of the game. Thus, during the European Cup Paul predicted that the German team would win all of its 6 games but got 2 of the results wrong when the German team was defeated by Croatia in the group phase and by Spain in the final. As it turns out, Paul was just honing his divination skills.
 
Two years later, during the group phase of the World Cup the cephalopod correctly predicted that Germany would defeat Australia and Ghana, and lose against Serbia, but still he remained a local phenomenon. It was during the round of 16 games when Paul predicted that Germany would defeat England that he began to receive international attention, and then everyone went wild when the octopus correctly predicted that Germany would defeat Argentina in the quarter finals. Paul's divinations began to be transmitted live throughout Germany and to other countries, and pundits for and against the mollusk expounded their views in electronic and printed media. Paul became a superstar, a media sensation with his own Twitter and Facebook fan pages. The German soccer fans sensed that the mysterious forces that Paul channeled were on their side. Would Germany win the World Cup?
 
Unfortunately it was not to be, Paul was an honest soothsayer and he called them like he saw them. For the next game he chose Spain as the winner. Gloom and doom washed over the German fans. The German players were shocked to learn the news: the cephalopod's "vibes" were no longer on their side. How could THEIR octopus do this to them? On the eve of the game they all prayed and many took solace that Paul had been wrong before, but to no avail, Spain defeated Germany in the semifinal. Angry fans flooded the German media with their favorite octopus recipes. Articles were printed labeling Paul a "traitor". The aquarium received threats and Paul's security detail had to be doubled. Spaniards on the other hand were delighted that the oracle was on their side. The Spanish president announced that he was considering sending a team of bodyguards to protect Paul, and Spain's environment minister promised to grant Paul the condition of an endangered species so Germans would not eat him.
 
Paul redeemed himself a bit by correctly predicting that Germany would defeat Uruguay in the game for third and fourth place. His handlers then for the first time asked the tentacled wonder to predict the outcome of a game where Germany did not play: the final between Spain and the Netherlands. In his final World Cup prediction, the mollusk chose Spain. This was significant as half a world away in Singapore another psychic animal wonder (albeit with a spottier track record), a parrot named "Mani", picked the Netherlands to win. So that fateful final game of the 2010 World Cup was not just the Netherlands vs. Spain, it was also a clash between the two psychic titans, the parrot vs. the octopus, and it was the invertebrate that prevailed.
 
Despite many hefty monetary offers to the aquarium to have Paul expand his soothsaying abilities to things like the economy as well as requests that Paul be present at different events to honor him, his handlers declared that the mollusk would retire from the divination business and would live the rest of his life making children happy at the Oberhausen Sea Life Center. Alas, as it turns out Paul’s days were numbered. He died later that year in October, and a memorial to Paul was erected at the Sea Life Center in Oberhausen.
 
However, besides all the fun and games some people have been left wondering whether Paul was for real. Was there something to his soothsayer abilities? Did Paul have hidden powers? Was he a psychic?
 
This question is not as silly as it looks. By the time Paul started getting noticed there were individuals who were betting on World Cup games based on his predictions. People "out there" believe the darnedest things, and I am sure that Paul's feat convinced many of his fans that there was something going on with this octopus beyond mere chance. So let's put Paul's performance into perspective.
 
First of all, the chances of getting the outcome of 8 consecutive games right is 1/256. This is the same as the probability of tossing a coin 8 times and obtaining heads every time. Although this is not a very probable event it is within the realm of the possible. Paul was not operating against a million to one odds here. One way to look at these odds is that if 256 people tossed a coin 8 times, at least one would succeed in obtaining heads eight times. If you consider that there were a billion plus people throughout the world watching the World Cup and trying to guess the outcome, you can calculate that 4 million people or so probably guessed the outcome of 8 games in a row correctly. However, none of them had the tentacles to become a media sensation.
 
The other issue to consider is possible sources of biases in the divination procedure itself.
 
Although octopuses like Paul do not have color vision they do perceive light and dark contrasts, and notice shapes including horizontal lines or bars. So, one possibility is that the flag design on one of the boxes attracted the mollusk's attention more than another. If Paul was attracted to the German flag design this could have biased his choice in favor of Germany, which he predicted to win 5 out of 7 times.
 
The box location is another possible source of bias. In 6 out of 7 of Paul's divination trials the location of the box he chose was the one on the right (the information about the position of the box is lacking for one of the games). This is important because in 4 out of 6 of his predictions the box with the German flag was also the one on the right. Did Paul predict accurately or did he have a bias for the box on the right and the flag of whoever won happened to be there?
 
Other possible sources of bias include whether any scent or food smears were stronger in one box vs. the other, or even whether the performance of some superstitious players could have been influenced, positively or negatively, when they learned about Paul's choice. The elimination of sources of bias is a common procedure in the scientific test of the abilities of psychics and so far in the history of scientific psychic testing, when all the biases are accounted for, not a single psychic has been able to perform above chance. Thus, if Paul's handlers had been interested in asking the question of whether Paul was for real, they could have concealed the flags, made sure the flags were randomly assigned to a given box, made sure there were no scent or food smears cues in either box, or even revealed Paul's choice after the game to make sure no superstitious players were influenced.
 
But the handlers were not interested in doing this because their intention was not to ask whether Paul really had psychic abilities. They just wanted to attract attention, raise money for the aquarium, and have a good time. And in this they succeeded beyond their wildest dreams. Others were not so fortunate. For example the Chemnitz zoo also in Germany tried its luck at the divination business with Leon the porcupine, Petty the pygmy hippo, and Anton the tamarin, but each of these animals struck out in the group phase of the World Cup picking the wrong team to win.
 
So let's all have a good laugh remembering the exploits of "The Oracle of Oberhausen" and not take things too seriously and, oh yes, enjoy a nice seafood dish every now and then.


The picture of Paul from "Voice of America" is in the public domain. The picture of Paul's memorial by Christophe95 is used here under an  Attribution-Share Alike 3.0 Unported license.

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3/25/2018

Have you been chosen? Are you destined for great things?

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Many people feel…well…“different”. They somehow believe that “something” is guiding them, edging them on to a future of significance. And this belief is reinforced by their life history. Maybe they narrowly avoided getting killed in an accident or in a situation of conflict, and maybe even not once but several times. Maybe they got a remarkable job, or a position, or a promotion that they thought they had no chance of getting. Maybe they surprised themselves by achieving something that many others could not achieve. They suspect that there is more than luck involved in their achievements or near misses. Clearly some greater force (call it Providence, fate, or whatever) has chosen them and is protecting them in order for them to fulfil something in the future. There are many examples of such individuals.
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Consider one of the most dramatic examples, Winston Churchill, who was Prime Minister of Great Britain during one of the most difficult periods in its history. From childhood to adulthood he survived so many diseases, accidents, and wartime situations that could have ended his life, that he developed the belief that he had been chosen for great things. This was seemingly proven true when Churchill, against nearly insurmountable odds, led Britain to victory during World War II.

Could Churchill’s survival have been due to chance, or is there a deity, or force, or entity that protects and propels some individuals to overcome adversity and guide their people in times of trouble? This is not a scientific question, but we can certainly consider whether this proposition has some internal consistency.
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Consider the diametrical opposite of Winston Churchill, Adolph Hitler. He not only survived four years of military service during the First World War, but he also survived many assassination attempts and persevered against all odds to become Chancellor of Germany. As did Winston Churchill, Hitler believed he had been chosen by providence to achieve great things, however, the world considers him today the epitome of evil; a deranged tyrant responsible directly and indirectly for the death of millions.

How is the miraculous survival of Churchill any different from that of Hitler? If one is not fortuitous, it is hard to argue that the other is. To preserve the consistency of the proposal that a deity, force, or entity chooses, protects, and propels some individuals towards good things in times of trouble, you would have to accept that there are also deities, forces, or entities that choose, protect, and propel individuals towards bad things. So, you are left with arguing that history is some sort of grand dueling ground of deities, forces, or entities, and we are the pawns.
 
There is, of course, a simpler explanation: chance. There are countless individuals on this planet that face extremely trying circumstances and perish in the process or are physically and/or psychologically scarred for life. A certain proportion of these individuals survive and go on to lead average lives. A smaller proportion develops the notion that their survival and success is somehow dictated by a higher power, and this factor may become a driving force behind the choices they make in life (both good and bad). Finally, out of this last group of individuals a select few find themselves in the right place at the right time, and have the smarts, the talent, and the character to propel them to positions of power where they can influence the lives of millions of people.
 
These are the really scary ones.
 
When you develop the notion that you are being guided by a higher power, there is the temptation to not listen to opposing views and to see all those that oppose you as standing in the way of the fulfillment of your rightful preordained destiny. You may here be tempted to argue that you would choose Churchill over Hitler any day of the week, nonetheless consider this: in this post I presented Churchill and Hitler as polar opposites, but the truth is far more complicated. Churchill participated in, promoted, and sanctioned many despicable colonial and imperial activities of the British Empire, and he held dismal opinions of non-white cultures and individuals. In the real world, boundaries are blurry things.
 
Science has found that our brains are programed to look for patterns, and we often can’t avoid making sense of the swirling reality around us by interpreting it within the context of our personal history and beliefs. Most of us may rationally understand the role of chance if we flip a coin ten times and obtain ten heads, but surviving ten assassination attempts is something that we may interpret in a vastly different way. Such is the complexity of the human mind, but still we must try. So please, next time that sensation of feeling special, of being chosen, of being destined for great things comes along, do humanity a favor and read a little about probability.

Thanks!


Churchill picture by Yousuf Karsh used here under a Creative Commons Attribution 2.0 Generic (CC BY 2.0) license. Hitler Picture, copyright by Roto3'14 used here under a Creative Commons Attribution-Share Alike 4.0 International license.

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