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In designing databases and data systems, we seek to accurately represent the real world and data about the real world. But our ability to think about the real world is hampered by the special meanings we have attached to ordinary words, making it difficult or impossible to reason without inadvertently carrying along the intellectual baggage of a particular technical view of reality.
Part I of this book returns us to the ordinary English meanings of words that we have co-opted for special purposes in the field of information technology. By the end of this section, your mind will be refreshed to remember the way we use these words in ordinary speech. This will prepare you to learn new, more precise meanings for these words that will make them powerful tools in analysis and design.