برخی از دلایل غیرعلمی بودن آموزه‌های یونگی:
- that some Jungian concepts, such as archetypes and synchronicity, cannot be proven by the scientific method

- that Jung subscribed to a nineteenth-century notion of evolution that has since been discredited

- that Jung's valuation of the mental functions of feeling and intuition on the same level as thinking weakens the attitude of rational objectivity that is essential in scientific research

- that Jung's interest in occult traditions, including the pre-scientific European past (third-century Gnosticism and medieval alchemy) and contemporary Asian cultures (Taoism and Tibetan Buddhism) amounts to a glorification of mysticism and irrationality

- that Jung's clinical specialization in the treatment of schizophrenia and his own brush with psychosis made him an untrustworthy guide to "ordinary" reality