I haven t looked it up in a dictionary so I don t know what the difference is supposed to be between a principle and a property But I do believe that the people who call it the superposition principle are talking about exactly the same thing as the people who call it the superposition property Anyway Google says that the phrase superposition principle is 20 times as common as the phrase superposition property I d say Wikipedia should stick with the overwhelmingly more common term whether or not it s linguistically and pedagogically ideal But maybe I m misunderstanding what you re proposing Anyway since superposition property appears to be a synonym for superposition principle less common but not unheard of it seems to me that it s perfectly sensible to create a redirect page from there to here