In Mathematics, when we make a mistake in solving a problem, this mistake is also transferred to the calculations of the problem and usually leads us to an incorrect result. If we transfer this incorrect result to Physics, e.g. in the study of a topic, then we usually end up with an incorrect conclusion about the topic of our study. Some scientists, when they make a mistake, whether due to overconfidence, or of lack of information, or of something else, often, instead of correcting their mistake, try to verify it by basing the verification on a new mistake of theirs. In this case, when we verify an error with a new error, we do not simply end up with an incorrect result, but we create an ambiguity that often completely alters the reality. Something similar has happened with the Special Theory of Relativity, where Einstein incorrectly assumed that a stationary observer located outside a space moving at a speed "a" relative to the observer, for a ray of light moving at a speed "c" within the moving space, will measure the speed of light c΄=c, which is an incorrect measurement, instead of the correct measurement which according to the invariant Mathematical Law of Superposition will be c΄=c+a. Einstein verified the incorrect and paradoxical equation c΄=c based on incorrect experimental data as we will see, and used it in all the calculations of the Special Theory of Relativity, with the consequence that all the results of the calculations of the theory are incorrect. Then he transferred all the results of the incorrect calculations to the theory, with the result that all the conclusions of the Special Theory of Relativity to be also incorrect. On the incorrect conclusions of the Special Theory of Relativity, Einstein also based the General Theory of Relativity, with which he tried to explain the cause of gravity. However, apart from some more accurate calculations, than the calculations of Newton’s theory, when we examine gravity on a global scale, for the cause of gravity, the General Theory of Relativity did not give us, any other clear positive result.