Philosophy
The Value of Knowledge and Epistemic Luck
Quick fact
In a famous case, a person believes the CFO's name is 'Mr. Nogot' based on strong evidence, but the name is actually shared by another person in the office—making the belief true by sheer coincidence rather than by justification. This shows that justified true belief can still fail to be knowledge when epistemic luck is involved.
Why this is interesting
We usually think knowledge is better than a lucky guess. But what if even a fully justified true belief turns out to be lucky—and is that still knowledge?
Read the full explanation
Understanding The Value of Knowledge and Epistemic Luck
Imagine you flip a coin and believe it will land heads. It does. Your belief is true, but it was a lucky guess—you had no good reason to think so. Now imagine you have a very reliable weather app that says it will rain, and it does. That seems like knowledge. The difference? The second belief is not merely true by luck; it is connected to the world in the right way. But what is that 'right way'? For centuries, philosophers thought knowledge was simply justified true belief: you believe it, you have good evidence, and it's true. But then counterexamples appeared—such as a person who has strong evidence for a belief that happens to be true for an unrelated reason. In such cases, the belief is justified and true, but we don't want to call it knowledge. This is the value problem in disguise: if a true belief can be lucky, why is knowledge more valuable than just true belief? The answer seems to involve eliminating luck, but that's tricky.
A deeper explanation
The core issue is that the traditional tripartite analysis of knowledge as justified true belief is undermined by cases of epistemic luck. When a belief is true by accident, it seems merely lucky, and we don't regard it as a genuine achievement. In contrast, knowledge is typically valued because it represents a reliable connection between the mind and the world. The value problem asks: what does adding justification to true belief contribute that makes it more valuable than mere true belief? One influential response is that knowledge is valuable because it results from the exercise of our cognitive virtues—abilities that reliably track the truth. This leads to virtue epistemology, which argues that knowledge is a true belief that arises from intellectual character, not just any justified belief. Another response is externalism, which maintains that what makes a belief justified is the reliability of the process that produced it, thereby removing luck. These debates reveal that the value of knowledge lies in its being non-accidental, and that understanding epistemic luck is central to any satisfying account of knowledge.