Why Removing a Contested Climate Chapter Protects Judicial Legitimacy
The Bottom Line
In a new essay for RealClearEnergy, CFJ Senior Counsel for Law and Policy Jeffrey E. Depp argues that the Federal Judicial Center’s removal of a contested climate-science chapter from its principal scientific-evidence manual was not an attack on science. It was a defense of judicial neutrality, the adversarial process, and the separation of powers.
The National Academy of Sciences subsequently removed the chapter from its website while it conducts an independent review of the process used to develop it. That review is not yet complete. But the institutional question raised by the controversy extends well beyond one chapter: Should contested scientific and policy conclusions acquire the prestige of official judicial guidance before they have been tested in individual cases?
When Guidance Begins to Decide the Case
The Reference Manual on Scientific Evidence helps federal judges evaluate complex expert testimony under Federal Rule of Evidence 702. That gives the manual considerable institutional weight.
The danger arises when a guide intended to educate judges begins supplying them with predetermined conclusions about contested questions implicated in active litigation. A chapter carrying the approval of the federal judiciary and the National Academies can influence how judges understand a dispute before the parties present competing evidence, challenge methodologies, or cross-examine expert witnesses.
The proper alternative is not judicial ignorance. It is adversarial testing.
Public Choice and Expert Institutions
Depp applies Public Choice theory to a domain often treated as if it exists outside institutional incentives.
Scientists, professional associations, government bodies, and nonprofit institutions respond to funding structures, reputational pressures, ideological commitments, and incentives for institutional self-preservation. Expertise remains valuable, but expert organizations should not be presumed immune from the same incentive problems that affect other human institutions.
That is why disclosure, methodological scrutiny, competing testimony, and transparent procedures matter. Institutional prestige cannot substitute for evidentiary testing.
Hayek and the Pretence of Knowledge
The essay also draws on F.A. Hayek’s critique of “scientism”—the belief that complex social and economic questions can be reduced to models sufficiently complete to justify centralized direction.
Scientific knowledge develops through criticism, revision, and decentralized discovery. When an official judicial publication converts disputed methods or policy implications into a settled framework, it risks freezing that discovery process and obscuring the difference between scientific evidence and political judgment.
Courts should evaluate evidence. They should not become central planners armed with prepackaged conclusions.
The Warning from Patent Law
American patent law demonstrates what can happen when courts move from interpreting legal rules to balancing economic policy.
Through Mayo and Alice, the Supreme Court expanded nonstatutory exceptions to patent eligibility under 35 U.S.C. §101. The resulting doctrine has produced persistent uncertainty over what kinds of inventions may receive patent protection. Federal Circuit Judge Kimberly Moore famously described one application of the doctrine as a “validity goulash” and warned of “result-oriented judicial action.”
That experience is directly relevant to climate litigation. In both settings, judges risk replacing generally applicable statutory rules with open-ended assessments of scientific merit, economic consequences, and social utility.
The result is not merely doctrinal confusion. It can undermine investment, property rights, democratic accountability, and confidence in the judiciary itself.
Restoring the Adversarial Process
Removing the chapter does not prevent litigants from presenting climate evidence. It requires them to establish the reliability and relevance of that evidence in court.
Experts may testify. Methodologies may be defended. Opposing experts may identify uncertainties and alternative explanations. Judges can then rule on an evidentiary record developed openly under the rules governing the case.
That is how courts preserve both scientific integrity and judicial legitimacy: not by declaring contested conclusions beyond dispute, but by insisting that parties prove their claims through the adversarial process.
