See this for another example of confusion between the two kinds of “no evidence”. I summarize:
People think that Cognitive Behavioral Therapy (CBT) is better than psychodynamic/Freudian therapies. This is because CBT has been tested to be better than placebo, but Freudian therapies have not been tested at all; mainly due to historical reasons. Of course, the fact that psychodynamic therapies have not been tested and therefore have no evidence in their favor, isn’t evidence against psychodynamic therapies. They simply have no evidence either way.
And when they went out tested CBT, psychodynamic therapies and placebo, they found that CBT and psychodynamics were about equally better than placebo.
See this for another example of confusion between the two kinds of “no evidence”. I summarize:
People think that Cognitive Behavioral Therapy (CBT) is better than psychodynamic/Freudian therapies. This is because CBT has been tested to be better than placebo, but Freudian therapies have not been tested at all; mainly due to historical reasons. Of course, the fact that psychodynamic therapies have not been tested and therefore have no evidence in their favor, isn’t evidence against psychodynamic therapies. They simply have no evidence either way.
And when they went out tested CBT, psychodynamic therapies and placebo, they found that CBT and psychodynamics were about equally better than placebo.