4. We are told that number is Quantity in the primary sense, number together with all continuous magnitude, space and time: these are the standards to which all else that is considered as Quantity is referred, including motion which is Quantity because its time is quantitative- though perhaps, conversely, the time takes its continuity from the motion. If it is maintained that the continuous is a Quantity by the fact of its continuity, then the discrete will not be a Quantity.