slug: fallibility name: Fallibility category: Theory of Reflexivity type: concept

Fallibility

Definition & Origins

Fallibility is the principle that human understanding of the world is inherently imperfect: every participant in social affairs operates with biased, incomplete, or distorted knowledge. For George Soros, this is not a lament about human stupidity but a structural feature of the human condition — the starting premise of his entire intellectual system, from the theory of reflexivity to the political ideal of the open society.

Soros borrowed the concept directly from Karl Popper, under whom he studied at the London School of Economics. Popper's philosophy of science held that empirical truth cannot be proven, only approached through conjecture and refutation: all knowledge is provisional, and certainty is unattainable. In The Open Society and Its Enemies, Popper turned this epistemology into politics — a society that accepts its own fallibility designs institutions for error-correction, while ideologies claiming final truth (his "enemies": Plato, Hegel, Marx) produce tyranny.

Soros internalized both halves of this teaching. "At a relatively early age I realized that our understanding is inherently imperfect," he told the Munich Security Conference in 2023, summing up a lifetime. What he added to Popper was the observation that fallibility in social affairs is doubly compounded: our thinking is not only imperfect, it is also part of the reality we are trying to understand.

Core Ideas

Two sources of fallibility. In his mature formulation — the 2014 article Fallibility, Reflexivity, and the Human Uncertainty Principle — Soros distinguishes two reasons human understanding falls short. First, the world is simply too complex for any mind to grasp fully. Second, and uniquely in social affairs, the situation being studied includes the participants' own thinking, so there is no independent, objective criterion by which their views could be judged true. Even a perfectly intelligent observer cannot step outside the loop.

Fallibility is not random error. If misperceptions were random noise, they would cancel out, as efficient-market theory assumes. Soros argues they are systematic: shared misconceptions become prevailing biases that move markets and history in one direction, producing boom-bust cycles.

The human uncertainty principle. Heisenberg's uncertainty principle in quantum mechanics holds that the act of observation alters the observed. Soros proposes a social analog: in human affairs, participants' decisions alter the situation in unpredictable ways. This makes the future of social systems genuinely indeterminate — not just unknown, but not yet decided.

Thinking participates in reality. Soros presses one step further than ordinary skepticism. In social affairs our imperfect views are not just descriptions of the world; they are constituents of it. A banker who believes a borrower is sound makes a loan that improves the borrower's soundness; a public that believes its institutions are corrupt behaves in ways that corrupt them further. The belief and the reality co-evolve, which is why no belief can be certified true in advance — and why fallibility leads directly to reflexivity rather than to mere caution.

Fallibility as a foundation for humility — and for freedom. The political payoff: if no one can possess final truth, no ruler, party, or ideology can legitimately claim absolute authority. Institutions must be built for self-correction — free elections, independent courts, free press, academic freedom. That is the entire logic of the open society, and the reason fallibility is not merely an epistemic footnote but the premise of Soros's philanthropy (see political philanthropy).

Practical Application

In investing. Fallibility translates into a concrete discipline: expect to be wrong, and make being wrong survivable. Soros has repeatedly said he is wrong as often as he is right; what made him successful was recognizing mistakes early and cutting losses. His famous rule — "it's not whether you're right or wrong, but how much money you make when you're right and how much you lose when you're wrong" — is fallibility operationalized (see macro investing). He treated his own theories the same way, describing The Alchemy of Finance as a hypothesis tested by a real-time experiment.

In policy analysis. Because policymakers are as fallible as markets, Soros distrusts grand designs. His euro-crisis writings constantly stress that the euro was born of a misconception — the belief that a currency union could work without a political union — and that policy errors, once recognized, could still be corrected: a boom-bust process "can be aborted or diverted at any point" (Prospect for European Disintegration, 1993).

In philanthropy. Open Society Foundations programs are designed around error-correction: support for independent media to expose official lies, watchdogs to check governments, education to teach critical thinking. The foundation is an institutional embodiment of fallibility. Even its grantmaking method reflects the principle: local boards set their own priorities, on the theory that headquarters cannot know what each society most needs — an admission of institutional fallibility that contrasts deliberately with the top-down conditionality of the IMF programs Soros criticized in Who Lost Russia?.

In self-knowledge. Soros includes himself in the principle's scope. He opens his 2023 Munich remarks by claiming only "modest success" in understanding the world, and his memoir-essays are full of owned errors: the harebrained "open sector" scheme for the Soviet economy, the misreading of Berezovsky, the mistimed tech trades. For him fallibility is not a pose but a discipline: the admission of error is the price of admission to reality.

Common Misconceptions

"Fallibility means we know nothing." Soros explicitly rejects this. Imperfect knowledge is still knowledge; some interpretations are demonstrably better than others, and falsification is real progress. Fallibility argues against certainty, not against truth-seeking.

"It is moral relativism." The opposite: fallibility grounds a strong commitment to truth and critical thinking. Precisely because no one owns the truth, societies need open contestation to approach it. Closed societies suppress error-correction; open societies institutionalize it.

"It applies only to ordinary people, not experts or models." Soros aims the principle most sharply at credentialed certainty — rational-expectations economists, central bankers who believed markets were self-correcting, and technologists who believe data equals knowledge. The 2008 crisis, in his reading, was a failure of expert theory, not of mass psychology (see market fundamentalism).

"Admitting fallibility means paralysis." For Soros it means the reverse: act decisively on your best current hypothesis, but hold it loosely, watch for disconfirmation, and reverse course without shame. That is how he traded, and how he thinks institutions should govern.

Soros's Own Words

Thought Evolution

Key Writings & Related Concepts