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Practical applications are irrelevant to theory's validity
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#:The data are not diverging from the predictions.
 
#:The data are not diverging from the predictions.
 
#''The lack of useful devices developed based on any insights provided by the theory; no lives have been saved or helped, and the theory has not led to other useful theories and may have interfered with scientific progress.  This stands in stark contrast with every verified theory of science.''
 
#''The lack of useful devices developed based on any insights provided by the theory; no lives have been saved or helped, and the theory has not led to other useful theories and may have interfered with scientific progress.  This stands in stark contrast with every verified theory of science.''
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#:(not done yet)
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#: Global Positioning System (GPS) uses general relativity to achieve greater accuracy<ref>http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html</ref>. Even if it were the case that no practical applications have come from relativity, that is irrelevant. The validity of a theory is test by its ability to accurately predict the results of an experiment. Relativity "has held up under extensive experimental scrutiny" <ref>http://relativity.livingreviews.org/Articles/lrr-2006-3/</ref>.
 
#''Relativity requires different values for the inertia of a moving object: in its direction of motion, and perpendicular to that direction. This contradicts the logical principle that the laws of physics are the same in all directions.''
 
#''Relativity requires different values for the inertia of a moving object: in its direction of motion, and perpendicular to that direction. This contradicts the logical principle that the laws of physics are the same in all directions.''
 
#:The rules for calculating inertia and other questions of mechanics are well known.  The inertia, that is, the way that a force affects an object's momentum, is well known.  Hundreds of physics textbooks discuss this in great detail, in terms of the Lorentz transform and the concepts of the force and momentum 4-vectors.  The "inertia" comes from what is now called the mass, which used to be called the "rest mass".  Archaic treatments formulated this in terms of the "relativistic mass", which was different.  The mass is a scalar, and has no direction.  The formulas for calculating the motion in terms of forces, in the direction of motion or transverse to it, are well known.
 
#:The rules for calculating inertia and other questions of mechanics are well known.  The inertia, that is, the way that a force affects an object's momentum, is well known.  Hundreds of physics textbooks discuss this in great detail, in terms of the Lorentz transform and the concepts of the force and momentum 4-vectors.  The "inertia" comes from what is now called the mass, which used to be called the "rest mass".  Archaic treatments formulated this in terms of the "relativistic mass", which was different.  The mass is a scalar, and has no direction.  The formulas for calculating the motion in terms of forces, in the direction of motion or transverse to it, are well known.
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