Simultaneously

The flaws of this concept in real life.

Lot of real life phenomena assumes the concept of Simultaneity.

It is easily shown that this concept is a myth. 

We cannot prove that any two events in the universe occurs simultaneously. 

We makes lot of assumptions in showing that two events occurring at spatially different locations occurs at same time. We use light signals as a medium of communication to show this. Though we use the principal of constancy of speed of light to do this, we trends to ignore that light signals consists of photons and single light signal is not a single photon but a bunch of photons that was emitted within a window of time and not in a single instant. And again we forget the uncertainty principal, and that it is impossible measure that, theoretically, two events happen the same instant using a moving messenger, because the uncertainty of the arrival time of the messenger due to uncertainty principal.

Well if simultaneity doesn't exist all the events of the universe should be able to be sequenced in a particular order. Strangely this is also not correct! The same problems when we tried to achieve simultaneity of events will crop up. It will be difficult to sequence certain events that happens within a short window of time. Principals of quantum theory will go against it.

The conclusion is that there is no simultaneity and it is even not possible to sequence all events that happens in the universe.

However, we know that when the window of time is sufficiently separated we can safely state that certain set of events happened before a certain another set. Practically we call this time. It seems that time is an entity related to entropy. Entropy is a statistical entity therefore the time as we experience should also be a pseudo entity that has no relation to the real world.