Sometimes scientists get it right, and sometimes they get it wrong. Humans are too complex to fit pet theories, but even scientists can notice what works.
Complaints about a new diagnostic manual show that psychiatry has a long way to go before being considered a legitimate science. That hope might never be fulfilled.
For professionals who should be concerned with evidence, many evolutionists are given to rampant speculation. The tipoff is usually a phrase like "may have," "could have," or "conceivably."