This bivalency would plague psychoanalysis throughout its development and offer critics ample opportunity to attack its weak flank, the putative scientific theory. By insisting on making psychoanalysis an objective science, Freud betrayed the more fundamental commitment to the deductive understanding of the unconscious. That inconsistency would leave psychoanalysis open to scathing criticism, for instead of claiming the approach as a method of interpretation through inferences and narrative constructions, limited by constraints easily identified and embracing a circumscribed skepticism, Freud sought to establish psychoanalysis as a means to decipher psychic cause - a positivist science of the mind - and thereby lost the support of those who understood the philosophical errors he committed."
Albert Tauber Freud - The Reluctant Philosopher (2010) p.104