Logic, Human Perception, and Cognition Are at the Heart of the Principle of Relativity

The principle of relativity (por) is deduced from 2 coordinate systems (cs_s) moving relative to each other with constant velocity.The por depends on 1 cs system designated the stationary cs and the other designated the moving cs.Neither cs has priority for being the stationary cs without an additional factor.That 1 cs is stationary and 1 is moving depends on human observers experiencing themselves at rest in their respective cs_s. Experimental evidence has shown that a human observer traveling at a constant velocity can experience himself at rest as long as he does not conclude based on certain perceptual cues that he is moving.An observer experiences himself at rest whether he is in the stationary or instead the moving cs. When the laws of physics are tested in these cs_s one finds the laws are invariant.The por is supported by 2 equivalent scenarios where in 1 scenario cs_1 is stationary and cs_2 is moving, in scenario 2 cs_1 is moving and cs_2 is stationary (where in each scenario, the human observers experience themselves at rest);this depends on cognition, perception. In special relativity, time and space are relative to a particular cs.Spacetime is defined by a particular cs.The cs_s are non-material, logical, and cognitive, and spacetime shares these features of the cs_s.