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What Do You Know? Chances are, not everything. Luckily, the unknown is full of opportunity.

By Romanus Wolter

Opinions expressed by Entrepreneur contributors are their own.

I recently spent some time with my 18-year-old nephew. It turnsout-- or perhaps I had just forgotten-- teenagers know everything.He talks with certainty, convinced he has figured out the world andall its complexities. During this trip, he was confident of animpending victory in his upcoming track meet.

As entrepreneurs, we know there is only one certainty in lifeand in business: change. No matter how much we prepare, somethingunexpected always occurs. New competitors enter the marketplace,established companies introduce new products and services, andcustomers continue to make unusual demands.

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