Simultaneity is the trademark of space, defined as adjacent systems that are perceived by an observer in simultaneity. The whole concept of 4D Einstein’s formalism is based in simultaneity of measure, using a single time present quanta dimension. So simultaneity we might say is space with the minimum time information (only 1 Dimension of lineal time and only a frequency quanta) It follows that what is simultaneous is also relative to the observer quanta of perception and that wholes which are slower in their clocks of time, see more simultaneous spaces, being able for that reason to become paradoxically minds of wholeness, and that as minds stop motion of time into form, information, languages are the substance on which simultaneity is based. Hence the quote of Paul Klee.
We shall in this post study with the Rashomon effect multiple points of view on the phenomena of simultaneity.