In the social sciences, we see a different angle on this.
There is "research" under the umbrella "critical methods" which rather than control for bias, the authors state their bias and make no efforts to gather any evidence to refute their own a priori conclusions. Part of their justification is that opponents have the same opportunity: They can gather evidence to support their viewpoint, and then it will all get worked out in the literature.
The problem is that for many pressing issues, political correctness will not allow the other side to voice their opinion. So one end becomes more and more "founded" in "research" while the other - which may be more correct (from a positivist POV) - gets less and less credible.