Commentary: What if math is really sloppy and inaccurate?
The computer game Civilization IV quotes a compelling thought: "If in other sciences we should arrive at certainty without doubt and truth without error, it behooves us to place the foundations of knowledge in mathematics." -Roger Bacon (Opus Majus, bk.1, ch4.).
I was thinking about this when a foundation head asked me the other day, how would I use sims to teach math?
Play Cisco's [Binary Numbers] game.
To answer that question, one first has to ask oneself, what is math, anyway? (And by the way, I use math everyday, quite a bit, and it is essential to create most simulations.)
And maybe the second part of the question is, as the Bacon quote suggests, is math perfect? After all, 1 + 1 always equals 2. And 5! always equals 120. Isn't that perfection? It seems like it.
Except, what if the symbols and numbers of math is a form of pedagogy (including taxonomies, graphs, and abstractions)? What if math is best seen as a layer of content on top of, and to augment, real experiences? (If someone throws a ball, using math I can figure out where and when it is going to land. If someone is spending X dollars, I can tell when they will run out.) In that case, the question of the "perfection" of math rests not just on the self-referential math-to-math manipulations (where math becomes a bubble-world), but also the real life-to-math, or math-to-real life transitions.
Here's a simple example: if I drive 60 miles per hour for 3 hours, I will have travelled 180 miles. That is a perfect statement. But does that perfectly translate to real life? Probably not, because no one drives exactly 60 miles per hour, and, perhaps, few people drive for exactly three hours. The math is sloppy and inaccurate, but good enough to be pretty helpful.
Or a simpler example: If I combine two piles of hay, what do I get? One pile of hay!
So, beneath a faux, self-defined perfection, in fact, math is sloppy and inaccurate, if asked to on- and off-ramp to the real world. Likewise, in an academic setting, the learning about math requires the systematic stepping back from, even refudiation, of reality.
What's the Point?
Is there a point to the math observation? Maybe.
Only if math is better defined as a tool for improving our relationship with the real world, not just as the rules of an insular, perfect little pocket-world, then we can create simulations to make people great at using math, instead of creating simulations that helps people become great at knowing math.
Furthermore, multiple levels of self-referential systems ("the point of second grade is to prepare a student for third grade," or "the stock market will go up because it has gone up," or "if you beat the simulation, you know how to use the skill in the real world") are the signs of a fall.
But breaking the perfect pocket world requires a view of math that is at odds with current schools, text books, standardized testing, and in fact entire philosophy of being. The odds of changing all of that are not so good. Especially because, quoting Roger Bacon, math is perfect.
As Yogi Berra would have said, "It's the Big Skills redux all over again."



6 comment(s):
Typically what we teach in K-12 school are algorithms and arithmetic - but very little math. Algorithms and notation schemes have been invented over centuries to help solve common problems. Some of these problems no long exist, but we teach the algorithms anyway, as they've become enshrined as "good for you". We get married to "tricks" like carrying the one, or long division, or FOIL, but that isn't math.
I'd say that it's arithmetic, not "math" that is used to answer the question with 180 miles, and if you teach children that in the abstract, it's just opportunity lost to get them thinking about bigger thoughts like measurement error.
Thanks, Sylvia. I appreciate the comments and perspective.
In addition to what Sylvia said, which is 100% true, I think it's important to note that you are talking mostly about the difference between pure and applied mathematics. Pure mathematics exists in our heads. Every so often, someone discovers an element of pure mathematics that can be used as a fairly accurate approximation of some real world phenomenon. Only then does it become applied. The thing is, we can't always tell what will become "useful" and what won't. It is common for formulas and theorems to be tucked away on some dusty shelf for hundreds of years before a practical application avails itself. Both pure and applied are essential. They are two sides of the same coin, and we can't afford to lose either.
I don't think of it as the difference between apple math and pure math (of which I think of both as focused college disciplines), as much as teaching high schoolers calculus vs. combinatorics. Or even, an institutional bias towards modeling physics towards the nth degree of certainty, but a fear of modeling social situations or dynamics because, while it might be ten time more useful, it is only one one hundredth as accurate.
By the way, at least one person will say this is the stupidest post I have ever written, and maybe even that they have seen in a long time. And they could be right. If I get cancer, my hope will be that some great scientist using bio-informatics will crunch data using new mathematical techniques on existing research to come to new conclusion, and then model it using further computations, all resulting in new treatments that will let me live 20 years longer. I know that. And yet does this post, or a version of it, resonate with anyone? Are we thinking of mathematics the wrong way?
I definately do not think it's stupid - I think K-12 school has some extremely serious problems in what we teach, and there is no worse place than what we call math.
And why not open a second front, it just makes your basic argument stronger.
Defining math IS difficult, there are many aspects, as Tony says, and people tend to use the word for anything that involves numbers. So you are working against a common understanding that lumps everything together. It's like asking a doctor what "sick" means.
The question (for a sim designer, anyway) is what is your goal? If you are trying to help students get better scores on their "math" tests, then you have to settle for a sim that conforms to these defintions. It's a limited goal, but as you say, changing the world is hard and the odds are against you.
Post a Comment