smoothly and efficiently. For one thing, hypotheses and observations are not totally inde-pendent of each other, as we have assumed in the description of the idealized scientific method. The coupling of observations and hypotheses occurs because once we begin to proceed down a given theoretical path, our hypotheses are unavoidably couched in the language of that theory. In other words, we tend to see what we expect to see and often fail to notice things that we do not expect. Thus the theory we are testing helps us because A Note-able Achievement Post-it Notes, a product of the 3M Corpora-tion, revolutionized casual written communi-cations and personal reminders. Introduced in the United States in 1980, these sticky-but-not-too-sticky notes have now found countless uses in offices, cars, and homes throughout the world. The invention of sticky notes occurred over a period of about 10 years and involved a great deal of serendipity. The adhesive for Post-it Notes was discovered by Dr. Spencer
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Post-it note, Cynthiana, Kentucky, Dr. Spencer F. Silver, Post-it Notes, accepted Post-it Notes