Only times related to each other -that is, differences in time- and locations related to each other can be measured and by that cognized. There is no way of cognizing absolute time and location in space. To put it another way, neither the beginning of time, nor the center of space can be defined.
This is true. However, it does not follow from this that they do not exist.
By knowing the value of a difference and being aware that it is the result of a difference, neither the degradable nor the subtrahend can be gotten. The reason for this is simple: an equation with three unknown values cannot be solved from one piece of data, with one equation. It does not follow from this however that neither the degradable nor the subtrahend exists.
Let us presume we know that a football match lasted 90 minutes. However, we will not know from this when the match started and when it finished. (If we knew either one of these two data, on the basis of that it would be possible to determine the other data.) Yet this does not mean that the time did not have a beginning at some point or that afterwards the match was not one of a real length of time.
Let us say that we are standing exactly three meters north to the main entrance to the White House in Washington, D.C. We will not know from this where the White House itself is located, and where we are located in some system of absolute-space coordinates. It does not follow from this however that this space does not have a center with the White House of a real distance from it.
When we are paying for our custom at checkout in a store and give the cashier more than the exact some, the cashier will enter on the till how much we have to pay and how much we actually paid, and the machine will write on the receipt how much money we are to get back. If we have a look only at this item on the receipt, we will not be able to tell how much we paid, and how much was to be paid for the things we have bought. However, it does not follow from this that we did not give the cashier a certain sum of money or that we did not have to pay a certain sum of money.
On the contrary, it can be deduced from the three examples that each of the above exists.
Generally speaking, the conclusion can be drawn that as the differences exist and we know they are differences, there also exists absolute value.
Thus, there exists absolute time, but its starting point is not cognizable.
There exists absolute space, but the location of its center is not cognizable.
Dr. Endre Simonyi