Investigators found, however, that in following up the ramifications of the instincts they hit upon configurations which could not with certainty be ascribed to either group. To take but one example: the discoverer of the power instinct was in some doubt as to whether an apparently indubitable expression of the sexual instinct might not be better explained as a “power arrangement,” and Freud himself felt obliged to acknowledge the existence of “ego instincts” in addition to the overriding sex instinct – a clear concession to the Adlerian standpoint.
