This is a fundamental question, and the answer depends on the field. There is no single authority that determines truth in every case. Instead, truth is established through different methods of verification, while misinformation is identified when claims fail those methods.
Here are the main approaches:
- Empirical evidence (science)
Claims are tested through observation, experimentation, and measurement.
Results should be reproducible by independent researchers.
Scientific conclusions are always provisional—they can change if stronger evidence emerges.
For example, if someone claims a new drug cures a disease, researchers conduct controlled clinical trials to test that claim.
- Logic and mathematics
Truth is established by proof from agreed-upon axioms and rules of reasoning.
Once a theorem is proved correctly, it remains true within that mathematical system.
- History
Historians compare multiple independent sources, documents, artifacts, eyewitness accounts, and archaeological evidence.
Confidence increases when different sources converge on the same conclusion.
- Law
Courts determine what has been proven according to legal standards such as “beyond a reasonable doubt” or “balance of probabilities.”
A legal finding is not necessarily the same as objective truth; it reflects what has been sufficiently established under the law.
What is misinformation?
Generally, misinformation is information that is false or misleading, regardless of whether the person sharing it intended to deceive. (Deliberately false information is often called
disinformation.)
Determining whether something is misinformation typically involves asking:
- Is the claim stated accurately?
- Is there credible evidence supporting it?
- Is the evidence stronger than contrary evidence?
- Have independent experts reached similar conclusions?
- Can the claim be independently verified?
Who decides?
No single individual or institution has a monopoly on truth.
Instead, reliable conclusions usually emerge through:
- independent investigation,
- open criticism,
- replication,
- peer review (in science),
- transparency of methods,
- and ongoing correction when errors are found.
One of the strengths of science is that it is designed to be self-correcting. Many accepted ideas have changed over time as new evidence accumulated.
Why do disagreements occur?
People often disagree because they differ on:
- which evidence they consider credible,
- how they weigh competing evidence,
- how much uncertainty they are willing to accept,
- or what values they prioritize when evidence is incomplete.
In rapidly evolving situations—such as emerging diseases, new technologies, or breaking news—the available evidence may be limited. In those cases, experts may disagree initially, and recommendations can legitimately change as better evidence becomes available. That does not necessarily mean earlier conclusions were deceptive; it may reflect the normal process of updating beliefs in light of new information.
A useful practical standard
When evaluating an important claim, ask:
- Is the evidence publicly available?
- Can independent experts verify it?
- Has it survived serious criticism?
- Would the conclusion change if better evidence appeared?
Claims that consistently meet these tests are generally considered more reliable than those that rely primarily on authority, anecdotes, or unverified assertions.
This approach doesn’t guarantee certainty, but it is one of the most robust methods humans have developed for distinguishing well-supported claims from misinformation.
