What is 1.5V, 9V or 12V really means?

Who the hell ever said that the electric potential field wasn't measured in volts?! Of course it is. YOU maintain that the values in the electric potential field do not represent potential differences, and they most certainly do. If they don't, then why are you unable to explain what the value of the voltage at a point means or how you even calculate what the value of the voltage at a given point in an electric potential field is? Could it perhaps be because doing either requires the recognition that the values of the voltage in an electric potential field represent voltage differences (or potential energy differences per unit charge) between that point an a reference point?