ABSTRACT
This conclusion presents some closing thoughts on the concepts covered in the preceding chapters of this book. The book reveals that in practice apparently regular events observed in nature are used to set the time standard. It describes the Galilean perspective: Times can be described with numbers which can take any value in the real number system. One of those numbers can be used to describe the present and then all the events in the universe can be associated with a number by measurements of the time between those events and the present. The book discusses some of those assumptions that are known not to be correct and the errors are especially large if the clock systems are moving with high speeds with respect to one another. It also describes reality in a way quite close to the Newtonian one in terms of the positions and velocities of point particles.
