Popper ngringkes pitakén-pitakén puniki antuk maosang indik kriteria utama saking status ilmiah asiki teori inggih punika wantah kapagehannyané punika "prasida kapalsuang, utawi prasida disangkal, utawi prasida malih kauji".
Popper summarized these statements by saying that the central criterion of the scientific status of a theory is its "falsifiability, or refutability, or testability".