Since the Lorentz boost is symmetric under exchange of x and ct , special relativistic phenomena
will also manifest this symmetry. Firstly, simultaneity becomes paired with ‘colocality’ (‘at the
same place’), and the ‘Relativity of Colocality’ becomes the dual to the well-known ‘Relativity of
Simultaneity’. Further, Lorentz time contraction arises from reversal of the observation conditions
pertaining to time dilation, expressible figuratively as ‘ Moving clocks run slow, but moving time
runs fast ’. Symmetry also dictates that the most fundamental observational modes are: (1) the
simultaneous observation of length, a process involving both the relativity of simultaneity and
length contraction; and (2) the colocal measurement of duration, involving both the relativity of
colocality and time contraction. Only the first of these modes is well known. The adoption of this
symmetrical lexicon provides a necessary logical basis for interpretational studies of observa…