Length contraction, like time dilation, is a manifestation of the relativity of simultaneity. Consequences of this include relativity of simultaneity. The Sagnac effect can be considered a manifestation of the relativity of simultaneity. The first derivations of relativity of simultaneity by synchronization with light signals were also simplified. This is possible due to the relativity of simultaneity. Thomas rotation results from the relativity of simultaneity. Concurrence is also known as simultaneity or contemporaneity. However, those paradoxes can simply be solved by a correct application of relativity of simultaneity. Since in relativity the notion of simultaneity is not absolute, this is unattractive. The second argument, however, completely ignores the relativity of simultaneity. The resolution of the paradox again lies in the relativity of simultaneity (Ferraro 2007). This apparent paradox results from the mistaken assumption of absolute simultaneity. Another method was shown by Dewan (1963) who demonstrated the importance of relativity of simultaneity. The most salient points involve the concepts of "simultaneity" and "spacetime". "i" due to relativity of simultaneity, long before C started to tick.