Synchronism

Before computers, it made more sense to propose larger shifts in the time scale cultures like ancient egypt than it does now. Now that we have computers, it's possible to correlate large amounts of data in a way that makes the time line much more precise. This is based around finding what are known as syncronis sa. Synchronism is something known to have co existed at the same two things known to haveCo existed at thesame time. And then we can use a computer to take all those hundreds and hundreds of synchronisms and build a time line out of them.