cannot know ourselves to possess chastity ‘if we don’t know what chastity is. ergo 'chastity' is ontologically uninformative

 To proclaim the existence of numbers, species, or statues whatever they are is ontologically uninformative

Even Aquinas, in some texts, might be read as expressing caution in this regard, as when he wrote that we cannot know ourselves to possess chastity ‘if we don’t know what chastity is