Neuroscience Viewpoint of Dreams

However, as with so many theories that dreaming has a function, there is no evidence yet that dreaming is more than an epiphenomenon, a functionless byproduct of neural activity.

I find statements like this to be completely intellectually dishonest.

It evaluates a theory (dreaming has a function) by requiring evidence when pitting it against another theory (dreaming is a epiphenomenon, a functionlist byproduct of neural activity) where no such evidential standard is required while implying the latter theory is the prevailing truth.