What’s Three Orders of Magnitude Among Friends?
(Alternate title: “Numbers Mean Things”.)
The increasingly-irrelevant Uncommon Descent blag had a post today, commenting on an article in Science News.
Right now, UD’s post is entitled “Timing of human use of fire pushed back by 300,000 years”, but when it showed up in my RSS reader, it was “Timing of human use of fire pushed back by 300 million years“. This mistake survives in the post’s URL:
http://www.uncommondescent.com/human-evolution/timing-of-human-use-of-fire-pushed-back-by-300-million-years/
From skimming the Science News article, it looks as though a new study found evidence of fire being used one million years ago, pushing back the earliest-known use of fire by 300,000 years. So presumably the previous record-holder was 700,000 years ago.
The author at Uncommon Descent reported the 300,000-year difference as “300 million years”. But hey, what’s a factor of 1000 between friends?
To illustrate, imagine a student in school in 2012, writing a report about, say, e-commerce. At first, she dates the origin of e-commerce to 1994, when Amazon.com was founded. But upon further investigation, she finds an example of a company selling stuff on the Internet in 1987 and revises her report to say that e-commerce is 25 years old, not 18. That’s about the magnitude of what the scientists found.
Now, along comes UD and reports this as “Origin of e-commerce pushed back to 22,000 BC.” That’s the size of their mistake.
It’s easy to make fun of primitive people whose counting system goes “one, two, three, many”. But the truth is, we all do this to some extent. Imagine a newspaper headline that says, “Federal budget increases by $600 billion, including $300 million increase in NASA funding.” Did you think, “holy cow! NASA got half of that extra money!”? If so, I’m talking to you: you’re not counting “one, two, three, many”, but you are counting “ten, hundred, thousand, illion”.
At any rate, I still question the numeracy of whoever wrote that UD headline. If you’re going to spell out “million” in letters, it should trigger a reality-check mechanism in your brain that makes you ask, “Wait a sec. 300 million years ago. That’s the age of dinosaurs or earlier.”