Philosophical and Social Aspects of the Cold Fusion Controversy

Presented at the

IVe Congrès de la Société de Philosophie des Sciences

June 1, 2012, Montreal, Canada

Ludwik Kowalski (see Wikipedia)
Professor Emeritus
Montclair State University, NJ, USA


The area of research known as Cold Fusion (CF) is the arena of a science-and-society feud. The conflict is unprecedented in terms of duration, intensity, the caliber of combatants, and the deviation from basic principles of scientific methodology. It is also unprecedented in terms of two formal governmental investigations of the field. The US Department of Energy (DOE) has evaluated the CF claim--a chemical process triggering a nuclear process. The claim was rejected on "theoretical grounds," not by performing better experiments. The self-correcting nature of scientific progress, in both social and natural sciences, depends heavily on peer review. Depriving PhD-level scientists of that process, as practiced by editors of some scientific journals, violates the "New American Physical Society's Ethics Guidelines," described in the January 2003 issue of Physics Today. Such distortions of scientific methodology are worth studying.

1. Introduction

Scientific methodology (1,2) refers to the set of norms developed to deal with mistakes and controversies in scientific research. Most mistakes are recognized when new results are discussed with colleagues, or via the peer review process. Occasional errors in published papers are subsequently discovered during replications conducted by other researchers. Scientific results, if valid, wrote Huizenga, must be reproducible on demand. “When errors are discovered, acknowledged and corrected, the scientific process moves quickly back on track, usually without either notice or comment in the public press (3).” The process, in other words, is expected to be self-corrective.

The so-called "scientific method" is not a list of divine commandments. It is a set of norms described by scientists, and by those who observe their ways of working. The author of this article is a retired nuclear physicist who has observed cold fusion researchers over the last ten years, and participated in several CF conferences and three cooperative replication projects (in which the claimed results were not confirmed). The CF episode is an unusual controversy resulting from a sensational 1989 announcement made by Fleischmann and Pons (F&P). The event (4,5,6,7,8) divided physical scientists into two feuding camps (9,10,11,12,13,14). This is a rare example of a situation in which the expected self-correction of the scientific process was essentially stopped by two formal governmental interventions.

2. Role of Accepted Scientific Theories.

Why is the CF controversy unresolved? Because CF experimental claims are not reproducible on demand, and because they conflict with the generally accepted theory of nuclear reactions. A theory, in this context, is a logical/mathematical structure that agrees with a wide range of already verified experimental data. Scientists know the rule--theories guide but experiments decide. But they are very reluctant to abandon accepted theories. To be reluctant means to insist on additional verification of new experimental results.

Referring to such situations, Huizenga wrote (3): “There are occasionally surprises in science and one must be prepared for them.” Theories are not carved in stone; scientists do not hesitate to modify or reject them when necessary. Rejecting a claim because it conflicts with a theory is not as convincing as rejecting it on the basis of reliable empirical data. In that sense methods of validation of claims in physical and social sciences are similar. Scientific theories are models of objective reality; they are often changed, or modified, when new facts are discovered.

3. Levels of Confidence in Scientific Claims: Data and Explanations.

A discovered experimental fact is usually presented to the scientific community, to be independently confirmed or refuted. Experimental results are accepted--at a high level of confidence--when they become reproducible on demand. Absence of such reproducibility justifies suspicion of possible errors or fraud. Methods of validation of theories (explanations of facts) are slightly different. A new scientific theory is also presented to a community of experts, to be independently evaluated. Their level of confidence in a theory depends on the validity of underlying assumptions and on the rigor of quantitative analysis. But even a most reliable scientific theory, called a law, is said to be falsifiable, in principle, when conflict with reproducible-on-demand data becomes undeniable (15). Such unusual conflict could trigger a scientific revolution (16).

To explain something usually means to identify causes and to construct a logically satisfying model of reality. An attempt to explain a fact, or to resolve an apparent logical conflict, usually leads to discoveries of other facts. A classical example was the discovery of planet Neptune, in 1846. A more recent and less widely known example was the discovery of a subatomic particle named neutrino. Experimental data collected in the 1920's showed that beta rays (electrons emitted in radioactive decay) had lower mean energies than expected on the basis of the theoretical E=mc2 formula. Austrian theoretical physicist W. Pauli solved this "logical inconsistency" by suggesting that tiny neutral particles, later named neutrinos, were responsible for the missing energy. His hypothesis was formulated in 1933. Experiments confirming the reality of neutrinos were performed, 23 years later.

4. Unfortunate Terminology

The essence of the discovery announced by F&P was "excess heat." Their small electrolytic cell generated more thermal energy than the electric energy supplied to it. Trying to establish priority, under pressure from University of Utah administration, the scientists announced their results at a sensational press conference (March 23, 1989). They wanted to study the CF phenomenon for another year or so but were forced to prematurely announce the discovery.

The unfortunate term "cold fusion" was imposed on them (17). Why unfortunate? Because it created the unjustified impression that cold fusion is similar to the well known hot fusion, except that it takes place at much lower temperatures. This conflicted with what had already been known--the probability of nuclear fusion of two heavy hydrogen ions is negligible, except at stellar temperatures. It was a mistake to interpret experimental data before the results were recognized as independently reproducible. In fact, F&P had no evidence for the emission of energetic 1H, 3H and 3He products, listed in their first published paper (4). The only thing they knew was that the measured excess heat could not be attributed to a known chemical reaction. Claiming that the measured excess heat was due to a nuclear process was premature. The adjective "non-chemical" does not automatically translate into "nuclear."

Suppose the discovery had not been named cold fusion; suppose it had been named “anomalous electrolysis.” Such a report would not have led to a sensational press conference; it would have been made in the form of an ordinary peer review publication. Only electrochemists would have been aware of the claim; they would have tried to either confirm or refute it. The issue of “how to explain the heat” would have been addressed later, if the reported phenomenon were recognized as reproducible-on-demand. But that is not what happened. Instead of focusing on experimental data (in the area in which F&P were recognized authorities) most critics focused on the disagreements with the suggested theory. Interpretational mistakes were quickly recognized and this contributed to the skepticism toward the experimental data. Using unconfirmed data to justify the nuclear origin of excess heat, by F&P, was inconsistent with the prevailing norms of scientific methodology. A more recent case of violation of scientific norms, by a CF researcher, Andrea Rossi, is described in (14).

5. Two US Government Investigations of CF.

The significance of CF, if real, was immediately recognized. Some believed that ongoing research on high-temperature fusion, costing billions of dollars, should be stopped to promote research on CF. Others concluded, also prematurely, that such a move would be opposed by “vested interests” of mainstream scientists. Responding to such considerations, the US government quickly ordered a formal investigation.

A panel of scientists, named ERAB (Energy Research Advisory Board), and headed by John Huizenga, was formed to investigate CF in 1989. The final report (18), submitted to the DOE several months later, negatively interfered with the normal development of the field. Modest financial support for additional CF research, by the DOE, NSF, and other agencies, was practically stopped after the report was published.

It is interesting that only one of the ERAB's six conclusions referred to CF experiments; the remaining five conclusions were about anticipated practical uses of CF, and about various aspects of the suggested interpretation of results. Instead of focusing on reality of excess heat, critics focused on the fact that the hypothesis was not consistent with what was known about hot nuclear fusion. The same observation can be made about the six ERAB recommendations. Only one of them referred to possible experimental mistakes. It is clear that the ERAB observations were based mostly on ”theoretical grounds,” not on independently performed experiments. The unfortunate governmental intervention had one serious and unprecedented consequence--editors of some scientific journals started rejecting manuscripts written by CF scientists, bypassing peer review (19).

The second DOE investigation (20) of CF was announced in March 2004, nearly 15 years after the first. A group of 18 experts was selected to review new CF claims, such as linear correlation between excess heat and generation of helium. Helium was reported to be produced at the rate of one atom for approximately 24 MeV of released thermal energy. This was consistent with the theoretical E=mc2 formula for the suggested radiation-free D+D->He fusion. But the DOE experts were not asked to perform correlation experiments; they were asked to read the report submitted by five CF scientists (21), and to vote on whether or not the evidence for the claim was conclusive. Such a way of dealing with a controversy was not consistent with the scientific method.

Ideologically and politically motivated rejections of scientific claims are not new. Giordano Bruno and Galileo Galilei are well known examples. Lysenkovism--Stalin's discrimination of geneticists--is a more recent illustration. And cybernetics, in the Soviet book entitled “Short Philosophical Dictionary,” was defined as “bourgeois pseudo-science serving American imperialism.” Ludwik Kowalski accepted this kind of "truth" as a communist student in Poland (22). What can be done to make sure that similar discrimination will not be used in the US, to impose "the truth" about evolution, stem cell research, etc.?

6) Conclusion: More Questions Than Answers

Long-lasting controversies about scientific discoveries are not new. Alfred Wegener's theory of continental drift is a good illustration. Mainstream geologists rejected experimental data supporting his now-accepted theory for half a century. The CF controversy, however, seems to be different both in terms of governmental involvement and in the caliber of adversaries on both sides of the divide. Huizenga and Fleischmann were indisputable leaders in nuclear science and electrochemistry. Most leading CF researchers are PhD-level scientists. The same is true for many scientists who reject CF claims.

The long-lasting CF episode is a social situation in which the self-correcting process of scientific development was not allowed to evolve. To what extent was this due to extreme difficulties in making progress in the new area, rather than to negative effects of competition, greed, jealousy, and other "human nature" factors? Such unanswered questions (23) are worth addressing in the context of debates about science and society.

One thing is undeniable; the world is still waiting for the first reproducible-on-demand demonstration of a nuclear effect correlated with a chemical process. No progress is possible when reported experimental data cannot be reliably replicated in other laboratories. Considering potential CF benefits, and relatively low costs of research in this area, the DOE should have helped to resolve the controversy, one way or another, in a well-equipped national laboratory, during the second investigation. But it failed to do so. How can such a policy be explained? Why is CF research allowed to stagnate without financial support? These questions also belong to debates about science and society. Will the past 23 years be recognized as the painful beginning of a new paradigm, similar to those described in (16), or will this period be known as a pseudoscientific episode, similar to those described in (24)? How can the persistence of the CF controversy be explained? Were the US government interventions necessary or not?

1. K. Pearson "The Grammar of Science," Meridian Books, Inc., New York, 1957.
2. R.K. Merton (1942) "The Normative Structure of Science". In: Merton, Robert K.
The Sociology of Science: Theoretical and Empirical Investigations. Chicago, IL:
University of Chicago Press,1979, 267-278.
3. J.R. Huizenga, "Cold Fusion: The Scientific Fiasco of the Century, "Oxford University
Press, 2nd edition, Oxford, 1993.
4. M. Fleischmann, B.S.Pons and M. Hawkins, J. Electroanal. Chem., 261, 301, 1989.
5. F.D. Peat, "Cold Fusion", Contemporary Books, Chicago, 1989.
6. E.F. Mallove, "Fire from Ice: Searching for Truth Behind the Cold Fusion Furor," John
Wiley & Sons, Inc., New York, 1991.
7. F. Close, "Too Hot to Handle: the Race for Cold Fusion," Princeton University Press,
Princeton, New Jersey, 1991
8. G. Taubes, "Bad A Science: the Short Life and Weird Times of Cold Fusion,"
Random House, New Park, 1993.
9. Robert L. Park, " Voodoo Science: The Road from Foolishness to Fraud," Oxford University Press, USA (November 15, 2001)
10. Jed Rothwell, "Cold Fusion and the Future;” 2004; Amazon Kindle Book; also online,
11. E. Storms, “The Science of Low Energy Nuclear Reaction: A Comprehensive
Compilation of Evidence and Explanations About Cold Fusion,” World Scientific,
2007 (see
12. L. Kowalski, " Cold Fusion: Reality or Fiction," Progress in Physics,
April 2012, L17-L19.
13. Driscoll J. et al. "Issues Related to Reproducibility in a CMNS Experiment."
Journal of Condensed Matter Nuclear Science, 2011, v. 5, 34-41.
14. L. Kowalski, "Rossi's Reactors - Reality or Fiction?" Progress in Physics,
2012, v. 1, 33-35.
Also see:
15. Popper K.R. “Science as Falsification;” 1963, at:
16. Kuhn T.S. " The Structure of Scientific Revolutions." University of Chicago
Press, 1996
17. Fleischmann M. Private conversation in 2003, after his presentation: “Background to
Cold Fusion: The Genesis of a Concept” in: Proceedings of the 10th
Intercantionl Conference on Cold Fusion, World Scientific, 2006. Also see
H. Lietz and S. Krivit at:
18. DOE-1989 report:
19. L. Kowalski L.,"History Of Attempts To Publish A Paprer," 6/29/2004
20. DOE-2004 report:
21. P.L. Hagelstein et al:
22. Kowalski L. "Tyranny to Freedom: Diary of a Former Stalinist," Wasteland Press,
Shelbyville, KY, USA, 2009. (Also
23. Kowalski L. "Cold Fusion Is Not Voodoo Science;" personal recollections recorded
24. Langmuir I. "Colloquium on Pathological Science", 1953, as reported at: