Wilbert Smith Archives Files Box 1136 08 1136-08-p016

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this may mean little. For example, look at the number of dif- ferent types of aircraft which are in use in the U.S. Air Force alone. An example of one such trap is selecting a group of physical laws which we now accept as valid, and assume that they will never be superceded. Five such laws might be: " 1) Every action must have an opposite and equal reaction, 2) Every particle in the universe attracts every other particle with a force proportional to the product of the masses and inversely as...