http://www.youtube.com/watch?v=nb-SlbL_cJg

The device has to be custom fitted, custom calibrated, and hand made for each patient. It needs to fit perfectly in your ear. Custom medical appliances are expensive. You can have a cheap one that doesn't really work, or you can put a horn in your ear like in an old cartoon, or you can pay experts (doctors and engineers and skilled labor) to make the right device to cure your problem. It isn't a scam, or a flaw in the market economy.

As a comp teacher from U of Michigan, I can only concur. Single source research is not research. Encyclopedia research is not research. Only in primary school do you find encylopedias as the primary research school. So why does anyone who actually does research (a PhD for example) even care about Wikipedia? All you have to do is explain that any fact or idea found in any encyclopedia has to be verified with primary sources. Really, Wikipedia should expose the tenuous quality of all information, and force people to be suspicious of all information that they don't personally verify. Isn't that the point of a college education?

We want to produce trained skeptics with the will and the skills to judge each new piece of data on their own, and to have confidence in their judgment. Wikipedia only makes that goal more pertinent. In addition to all of the other good it does, I think we should thank it for that alone.