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Geekspeak: Why Life + Mathematics = Happiness
Graham Tattersall
The quirky offspring of ‘QI’ and ‘Freakonomics’, ‘Geekspeak’ melds ingenious statistical analysis with edifying trivia to explain away some curious facts of life.Curiosity is our human birthright, and destiny. As a species we are to prone to think, ruminate, reflect, cogitate, deliberate and philosophise. We do all these things, and why? To explain away the world around us, to find solace in knowledge, to answer all those seeming unanswerables: why are we here? Is there a God? Is there life after death? How many slaves on treadmills does it take to power my kettle?Yes, forget the Bible, ‘Geekspeak’ is the new oracle for 21st century living. Graham Tattersall, a confirmed and superior geek, has rescued maths from the prison of the classroom, imbued it with fresh new life, and put it to use in novel and unexpected ways. His ingenious, deceptively simple formula melds statistical analysis with personal experience and enlightening trivia to explain away some curious and oft-pondered mysteries of the world: how big is your vocabulary, how heavy is your house, do the dead outnumber the living, how powerful is a fly, how fast is a fart.With its recipe of sophisticated mathematical techniques, witty anecdotes and startling amount of learning, ‘Geekspeak’ is an essential tool for impressing friends, sounding intelligent and better understanding the fascinating world in which we live. Maths has a new champion, and the Geeks a new King.
GEEKSPEAK
GEEKSPEAK
How Life + Mathematics = Happiness
Dr Graham Tattersall
This book is written in memory of my father, who helped raise six children as well as quietly goingthrough life inventing, analysing, and mendinganything and everything.
PHOTOGRAPH
ACKNOWLEDGEMENTS
All photos, unless stated, taken from Stock.XCHNG.com.
Introduction: Living with Numbers: #347053, Aleksander Milosevic, Belgrade, Serbia
1 Scrabbling for Words: #650192, Steve Woods/Pinpoint, Essex, UK
2 Pumping Iron: #313419, Josef Lluis Caldentey, Spain
3 Safe as Houses: Author
4 Well Connected: #368906, Cory McKenzie, Canada
5 Fatal Attraction: #696930, Marcos Santos, Brazil
6 Home Alone: #656412, Liv Crazy, Australia
7 Beam Me Up, Scotty: #757924, Artiom, Ukraine (StockExpert)
8 Hidden Death: #97469, Ken Kiser, US
9 It’s For You: #6926, Stephen Gibson/ BudgetStockPhoto.com, Australia
10 War Chest: #522105, Marcin Barlowski, Poland
11 When the Wind Blows: #739813, George Bosela, US
12 You’re Rubbish: #315128, Liton Ali, London, UK
13 Nappy Crap: #560650, Pascal Montsma, Netherlands
14 The Cunning Fox: #769992, Lynne Lancaster (weirdvis), UK
15 Fly Wheels: #735390, Asif Akbar, India
16 Bus Stop: #198141, Tomasz Kowalczyk, Poland
17 Stirring Airs: #442256, Steve Ford Elliot, Eire
18 Dream Flight: #748302, Martin Brooks, UK
19 Processing Power: #370098, Max Brown, Sydney, Australia
20 Soul Mates: #264203, Paul Preacher, London, UK
21 Idiot Calculus: #282161, Anka Draganski, London, UK
22 The Ghostly Present: #708887, Robert Rosmond, New Orleans, US
23 Bad Breath: #398156, Tudou Mao, Shijiazhuang, China
24 Wave Power: Author
25 Mechanical Neurosis: #242268, Philippe Ramakers, Belgium
26 The Final Judgement: #19734, alxm (StockExpert)
27 Heavenly Body: #707105, Wojtek Wozniak, Zabrze, Poland
28 Passing Water: #633517, Emin Ozkan, Zmin, Turkey
29 The Man in White: #700514, Joan Koele, Netherlands
GEEKSPEAK
INTRODUCTION
LIVING WITH
NUMBERS
How Much can you work out about your own world?
For as long as I can remember, I’ve been fascinated by how things work. There’s a whole world of cogs, circuit boards and equations behind familiar objects and events, or the figures and statistics we see in the media. I can pinpoint the exact moment when this fascination was born: it was as an eight-year-old child on a family trip to the Scottish Highlands. Frantically looking for a way to distract his squabbling children, my father announced that ‘The first person to tell me the weight of that mountain gets to sit in the front of the car.’ I took on the task, excitedly shouting out wrong answers.
This was power – working out a new number, a new piece of knowledge about the world that hadn’t existed ten seconds earlier. And, it happened in a person’s head. It was amazing.
And that was it: I became a Geek.
A family friend dropped by after our return. He was an amateur radio enthusiast, and his car was festooned with all sorts of antennas. ‘Watch this,’ he said through a large smile, and placed his finger at the bottom end of an antenna.
The faint, sweet smell of burning flesh drifted towards me as the current from the antenna flowed through his skin, heating and burning its extreme outer surface, but without the strength to cause any pain or real damage.
I was transfixed. How had that happened? Why hadn’t it hurt? How deep had the current penetrated? And, was it possible to work out how much energy had been spent in his finger? Here were more questions, more knowledge to attain, more facts and figures, all calculable inside a person’s head.
The fascination with the simple conjuror’s trick of the burning skin has stayed with me, as a desire to explore the hows and whys lurking behind everyday life. And that, in a nutshell, is what this book is about: how to analyse your world and come up with your own new knowledge and understanding.
But perhaps most importantly, it’s about your ability to judge and check ‘expert’ opinion for yourself rather than take it as granted – about using your numeracy to be better informed in debates about our shared future.
Have a look at a couple of ‘expert’ assertions. Do you believe them? How would you judge their validity?
Britain should focus on the development of wind and wave power to meet its electricity generation needs.
Hormone replacement therapy (HRT) greatly increases the risk of breast cancer.
Neither statement can be tested without using some numbers: the amount of power that can be generated by a wind turbine, and the electricity needed to run Britain; and the statistical significance and experimental controls used to make the HRT assertion.
But the numbers themselves are of little value. For a more complete knowledge of the issues, the assumptions, caveats and uncertainties in their calculation need to be understood. And the only way to understand all those is to do the calculation yourself.
Many people think that to perform that kind of calculation you need to be an expert in the given field – which is why we tend to rely on experts. You might go along with that, and decide that it’s best to leave it to the professionals, the politicians and the people in white coats.
But there is another way: a path of knowledge, learning and understanding – the way of the Geek. Not an obsessive, narrow-interest, malodorous Geek, but a nice, thoughtful, sweet-smelling Geek, the kind you’d like as a friend.
A true Geek can get at the truth by understanding the limits of a calculation, by knowing when to approximate 3.783 million as ‘about 4 million’. A true Geek knows how to simplify the analysis so that the answer, though not spot on, will still be accurate enough to guide opinion.
Oh, and a true Geek is interested in the mathematics of body size, and of God, sex, food and a whole load of other things that also interest quite normal people.
And this is the rub. We live surrounded by figures: the power of a wind turbine, the amount the average family spends on food, the fuel consumption of a Boeing 747, the weight of sewage you create each year. Not being able to estimate such figures yourself – not speaking any Geek – is like living in a foreign country and not being able to communicate.
How can you trust statements made by academics, architects, scientists and politicians without checking the underlying numbers?
You can’t!
But you can work it out for yourself. And what’s more, once you’ve done that it’s better than just knowing the fact. You’ll understand the basis and limits of its truth.
So this book is about empowerment, by combining common sense, straightforward arithmetic and a little questioning of received wisdom.
This book shows you how to speak Geek.
1 (#ulink_ade80e7b-c840-54dd-8330-0f6942b2f14f)
SCRABBLING
FOR WORDS
How big is your vocabulary?
You know thousands of words with many different meanings. Jane Austen uses over 6,000 different words in Pride and Prejudice, and you can read them all without the slightest problem. In fact, your passive reading vocabulary probably exceeds 10,000 words. Can you remember the last time you heard or read a word whose meaning you didn’t know?
On the other hand, your active vocabulary – the words you use in everyday speech – will be much more limited. On an average day you’ll probably get by on a few hundred words. And those words say a lot about you: your sex, age and social class.
In the early 1990s, recordings were made of conversations and used to build a database of words in the English language. The database, held at the University of Lancaster, contains over 100 million words spoken by men and women of all ages and occupations. Some interesting facts were pulled out of this data by three researchers, Paul Rayson, Geoffrey Leech and Mary Hodges. One of the most startling is the difference between the kind of words used by men and those used by women. It turned out that there are certain words which act like fingerprints, showing that a conversation is between two men, or between two women.
These are the top three fingerprint words in women’s conversation:
she
her
said
And the three words most characteristic of man-to-man conversation:
fucking
er
the
Those top three female words are instantly recognisable as typical of ‘girl talk’. Just eavesdrop on a conversation between two women chatting near the office coffee machine: ‘And she said that her friend was really upset… And I said to her…’
As for the men, here are a couple of guys leaning over the open bonnet of a car: ‘What’s that fucking wire doing?’ ‘Er, dunno. The battery’s dead.’
Similar studies reveal words that distinguish social groups. Words such as ‘actually’ and ‘really’ are indicative of Groups A, B and C1; ‘bloke’, ‘bloody’ and ‘pound’ are distinctly C2, D and E.
The journey from the equality of baby burbling to speaking in ways that encode your gender, age and social status takes two or three decades, but you can go back to the first moments after your birth quite easily. Start by letting every muscle in your mouth and lips go slack. Now make a noise.
That grunt is called the schwa. It is the most basic, neutral vowel sound, and sounds similar, though not identical, when uttered by people with different mother tongues.
In the first few months after your birth, you’ll start to babble, and by the time you’re coming up to your first birthday you’ll have a few words. Those words use vowel sounds such as u as in ‘mum’ and a as in ‘man’. They’ll be bracketed by primitive consonants or nasal sounds such as m and n to create important words such as ‘mumma’ and ‘dadda’.
Fast-forward to the age of around eighteen months, and you’ll be making much more complex sounds by articulating most vowels and consonants, and introducing l and n sounds.
The extremes of the vowel sounds are the cardinal points of your language. In English, they range from a as in ‘cat’ and i as in ‘hit’, to oo as in ‘hoot’ and aw as in ‘saw’. You can utter a kind of sound circle with the cardinal vowels. Voice them in sequence and you’ll find that the sound changes smoothly from one vowel to the next.
Counting vowels, consonants, nasals, and l and r sounds, a fully developed English speaker can recognise at least forty-five basic sounds. They are called phonemes.
It used to be thought that each phoneme was a distinct acoustic event, but it is now accepted that many are psycho-perceptual. For example, the stop consonant pp in the word ‘apple’ does not exist by itself. A stop consonant is the sound we think we hear ourselves saying when we use our mouth to rapidly stop or start a sound. The pp in ‘apple’ is the sound made when we quickly close our lips to stop making the a sound, and then explosively open them again to continue with the le sound.
We perceive the stop consonant as an actual sound that exists between the a and the le. But if you look at the sound trace of someone saying ‘apple’, you’ll see a period of silence in the middle of the word. That’s the pp in ‘apple’. It doesn’t exist: it’s simply perceived because of the way the a and le are stopped and started.
One of the drawbacks of growing up speaking your mother tongue is losing responsiveness to speech sounds in other languages. This was demonstrated by Japanese researchers. They played sounds to infants while monitoring the frequency with which the infants sucked on a dummy. They sucked more often when there was a recognisable stimulus such as their mother’s face or a familiar sound.
Newborns, who had barely been exposed to their mother tongue, sucked rapidly when they heard any of a wide variety of sounds drawn from many languages. Older infants sucked rapidly only when they heard sounds used in their mother tongue. The researchers inferred that infants lose the ability to distinguish certain sounds when they start to learn a language in which those sounds are absent.
Now, hopefully many years after you stopped sucking because something seemed familiar, you understand, speak and read thousands of words. It’s rather strange that we bother, when just a few hundred words are sufficient for our daily lives.
So, how many words do you know?
It’s possible to work out the size of your passive vocabulary. One approach is to go through every entry in a dictionary and tick off every word you know. But if you’ve got other things to do in life, there’s a smarter way that gives a good estimate in a much shorter time. That method is called statistical sampling.
The idea behind statistical sampling is the same as used in surveys of, for example, voters. The nation’s intended voting pattern could be found by asking all 30 million voters about their plans for the voting booth. More practically, a representative sample of voters is questioned. The sample might consist of just 1,000 people carefully selected to represent all the localities and social groups in the country.
