Simultaneity and Concurrence

Simultaneity connotes no more than a momentary correspondence of two events.  In contrast, continuous Simultaneity is Concurrence.  So, what is presupposed in the Physicist Time-measurement of some motion is Concurrence between the object and the measuring device, i. e. because otherwise, the measurement might be subject to Time-dilation.  But in ordinary experience, Simultaneity is much more prevalent than Concurrence, except if it is assumed that all events are determined in advance by a unitary principle.  Still, Concurrence, like Simultaneity, entails Space between what comprises it.  Regardless, in ordinary experience, one's awareness of either entails Alteriority.  In other words, social consciousness, i. e. the awareness of the existence of others, is constituted by at least Simultaneity-awareness, and Concurrence-awareness characterizes collaboration.