If you have a 50-50 chance of success, there is a 75% chance of failure. No matter what happens, someone will credit it to his per theory. In any collection of data, the figure that is most obviously correct is the mistake. Information requiring a change of design will be given to the designer only after the plans are complete. If you have no interference fits on a job, someone will always make on for you. The eye of the cheif inspector is more accurate than the finest instrument. Experience varies directly with equipment ruined. The probability of any given event occurring is inversely proportional to its desirability. Whenever you go to the bathroom at work, you will be paged. Nothing is impossible for the man who doesn't have to do it himself. Dimensions are always expressed in the least usable terms. Value Analysis normally increases cost and reduces performance. Blame will never be placed if more than one person is involved. Interchangeable parts won't. Graph recorders always deposit more ink on people than on paper. A fail-safe circuit will destroy all others. After the last of 32 screws has been removed, it will be discovered that the wrong access cover has been removed. After the last of 32 screws has been replaced, it will be discovered that the gasket has been omitted.