👉 In mathematics, a "promovable" object is an object that can be moved without changing its value. In other words, it cannot be made smaller or larger by any means other than translation. This property allows us to manipulate objects in ways that preserve their values, such as moving them around on a coordinate plane. For example, consider the set of all points $(x,y)$ in the plane satisfying $y = x^2 - 1$. The set is not "promovable" because
