Some characteristic methods that Einstein used to analyze the problems of the electrodynamics of moving
bodies are discussed. Einstein rejected the method of "accumulation of hypotheses", reevaluated the
results of electrodynamic experiments, generalized them in the form of the relativity principle, interpreted
this as a law of nature, and, significantly, made it the point of departure of a new theory—the special
theory of relativity. It is shown that Einstein gave great importance to generalizing the results of
experiments and the part played by theory, in which nature is regarded as an integral whole; for
Einstein, all the variable parameters used in a theory are interconnected and interdependent; this also
applies to space and time, which lose their substantiality and, thus, absoluteness. It is pointed out that it
was only the realization that the metric expresses the laws of physical interconnection that made possible
the formulation of the general theory of relativity. Einstein's negative position with respect to the
conventionalism of Poincare and Reichenbach, in particular the interpretation of geometry as a
conventionally chosen method of describing experience independent of physical interconnections, is
discussed. In connection with the criticism of conventionalism, consideration is given to descriptions of
one and the same experiment that have different forms, and it is shown that some of these descriptions
merely represent formal transformations that do not reveal new connections in nature whereas others give
the same results only at a definite stage of understanding, their subsequent development however
revealing that they correspond to different levels of penetration into the essence of the phenomena.