"Then let me explain my first reply. Any scientific theory undergoes several transformations before it is an accepted fact. For instance, some phenomenon is caught or observed by some experimenter. To explain the phenomenon, the scientist suggests an hypothesis. To further the art, the hypothesis is expanded so that other experiments can be performed. These have the dubious character of predictions; if such-and-such is the explanation, then if we do this-and-so, then something-that will take place. Physical laws and limitations are set up, and while one group works according to these laws, another group will try to ascertain whether or not the same effect can be produced because of some other proposition. Frequently the original observation produces erroneous evidence, and then the conditions are changed to meet the experimental evidence as such progress is made. Eventually the original hypothesis will become a theory. "In shorter words," continued Paul thoughtfully, "An hypothesis is a suggestion untested. A theory is an hypothesis which is undergoing test and for which some basis of truth is evident. A fact is a theory for which there is considerably more favorable evidence than unfavorable evidence, and a law is a fact against which no one has ever come up with any evidence to dispute it." Hoagland smiled tolerantly. "And what is Grayson's Principle, and why is this called a 'principle'?" "Haedaecker's Theory is that the Z-wave will not cross interstellar space because of the lack of solar activity. Grayson's Principle is that the Z-wave can be made to cross interstellar space under one certain condition, and that this condition is a prime limitation even in intra-solar communications. The 'principle' terminology," smiled Paul, "is like so many other names. Pedantically it is a principle because it is a prime factor. On the other hand, the name has a sort of ring to it when spoken aloud. I have an idea that 'Lorenz' is put before the 'Fitzgerald' because of the auditory ring; ending a name with a sibilant makes the possessive case difficult. 'Planck's Constant' rings better to the ear than 'Planck's Factor' and 'Avogadro's Law' is easier to manipulate than 'Avogadro's Principle.' These are not selected deliberately, they are chosen inadvertently by lecturers who tend to emphasize a phrase by its sound--even the unskilled lecturer will do this; a pure scientist with no grandiose ideas will automatically select a name that presents no lingual tongue-tripping." Hoagland smiled. "Ah, how we progress behind the scenes; from 'Fission-reaction' to 'A-Bomb' because of headline newsprint space. Semantics was a fine, definitive term until Korzybski got the word involved with dialectics. Possibly Korzybski decided that 'semantics' rang better to the ear than 'Dialectics.' But let's get back to Grayson's Principle. Take it from there, Mister Grayson." "The main idea is--"