Ultimately, when you come up with a classification scheme that is collectively exhaustive and mutually exclusive, then the theory can become what Kuhn called a paradigm.

There are other dimensions of biotechnology. If you think of biotechnology like the Internet, it's not a category - it's an infrastructure that can be deployed to sustain or disrupt. In health care, the most complex problems at the high end have to be dealt with in a problem-solving mode by the best, most experienced physicians you can find.

Christine and I haven't raised our children. A whole community of selfless Christians has contributed to helping them become faithful, competent adults.

How could Digital's collapse be so precipitous? It's because, in many ways, financial performance data is misleading. As you move up to the top of the market, you're getting rid of the less profitable products at the low end and adding business with more attractive margins at the high end. The rate of unit volume growth might be tapering off as you pursue these smaller markets, but your margins actually look better. So Wall Street rewards your stock price until you hit the ceiling.

If you just look at the data, you are led to believe that things are getting better, rather than worse. That's why the fall is really precipitous, once you hit the ceiling.

The outsourcing gurus have been driving the theory, and they are saying everybody ought always to do this. But it is really contingent on where you are on the spectrum from "not good enough" to "more than good enough," relative to each tier of the market.

Year after year after year, people write books about managing innovation or about leadership, for example, without ever going through the pain of saying, "This kind of leadership will cause this result in these circumstances and a very different result in those circumstances." This is academic malpractice of the worst kind.