Why progress requires accepting that we can always be wrong.
One of the greatest obstacles to learning is the assumption that what we currently know is correct.
Fallibilism is the recognition that any of our beliefs, theories, or explanations may contain errors, regardless of how convincing or well-supported they appear.
The principle is central to the philosophy of science developed by Karl Popper and further explored by David Deutsch in The Beginning of Infinity (2011).
Popper summarized the attitude of critical rationalism:
“I may be wrong and you may be right, and by an effort, we may get nearer to the truth.”
This does not mean that all ideas are equally valid or that reliable knowledge is impossible. It means that even our best knowledge remains open to correction.
Why Fallibilism Matters
We naturally seek confirmation of what we believe. Once we develop an explanation, we tend to defend it, particularly when it has worked in the past or forms part of our identity.
But confidence is not evidence of correctness. Neither expertise, consensus, experience, nor repeated success guarantees that an explanation is free from error.
David Deutsch argues that fallibilism is essential to knowledge creation because it encourages us to improve even our most successful explanations.
As he writes in The Beginning of Infinity:
“Fallibilism entails not looking to authorities but instead acknowledging that we may always be mistaken, and trying to correct errors.”
The implication is important: we make progress not by proving ourselves right, but by discovering and correcting where we are wrong.
How to Apply Fallibilism
Fallibilism can become a practical habit of thinking:
- Treat beliefs as provisional. Hold explanations with confidence proportional to the evidence, while remaining open to revision.
- Actively search for errors. Look for contradictory evidence, weaknesses, and assumptions that may be incorrect.
- Welcome criticism. Consider objections as opportunities to improve understanding rather than threats to defend against.
- Distinguish confidence from certainty. An explanation can be highly reliable without being beyond correction.
- Update your understanding. When a better explanation emerges, be willing to replace an existing one.
This approach requires neither permanent doubt nor endless deliberation. We can make decisions using our best available knowledge while remaining prepared to change our minds.
Fallibilism also explains why criticism is essential to science. Scientific progress depends on creating conditions in which theories can be challenged, errors can be detected, and better explanations can replace inadequate ones.
The alternative is dogmatism: protecting existing beliefs against criticism and preventing knowledge from improving.
The central principle of fallibilism is simple: we can never eliminate the possibility of being wrong, but we can continuously improve our ability to identify and correct our mistakes.
References
- Popper, K. R. (1945). The Open Society and Its Enemies, Vol. II, Chapter 24.
- Popper, K. R. (1994). The Myth of the Framework: In Defence of Science and Rationality. Routledge.
- Deutsch, D. (2011). The Beginning of Infinity: Explanations That Transform the World. Chapter 1, “The Reach of Explanations.”