Definability is a meta-property held by objects that determines how well their properties can be explicitly described. There are three major categories. If a verse has a certain level of definability, then all of its contents have an equal or lesser level of definability. A verse can not contain something less definable than itself, because the components of a -verse are part of the definition of the verse. A stronger property than definability is thinkability; things that have a certain level of thinkability are always equally or less definable.