At this stage, you are probably thinking that you much prefer the version of Equation ???, in which all quantities are real, and the expression for the interval between two events is \( ...At this stage, you are probably thinking that you much prefer the version of Equation ???, in which all quantities are real, and the expression for the interval between two events is [(Δx1)2+(Δx2)2+(Δx3)2−(Δx0)2]12.