Critical Thinking
Fact vs Opinion
Separating fact from opinion sounds simple but trips people up constantly — especially when opinions are stated with the confidence of facts. Here’s the real distinction.
| Aspect | Fact | Opinion |
|---|---|---|
| What it is | A statement that can be verified | A judgment, preference, or belief |
| Truth value | True or false, checkable against evidence | Not simply true or false; can be reasonable or not |
| Depends on | Evidence and reality | Values, taste, interpretation |
| Example | "Water boils at 100°C at sea level." | "Winter is the best season." |
| Common trap | False statements dressed up as facts | Opinions asserted as if they were facts |
When to use fact
Treat a claim as a factual one when it can, in principle, be checked against evidence — even if you don’t know the answer yet.
When to use opinion
Treat a claim as an opinion when it expresses a value, preference, or interpretation that evidence alone can’t settle.
Frequently asked questions
- Can a fact be wrong?
- A statement can be factual in type (checkable) but false in content — like "the Earth is flat." It’s a factual claim because it can be tested; it just happens to be false. "Factual" describes the kind of statement, not that it’s automatically true.
- Are opinions just as valid as facts?
- Opinions aren’t "true or false" the way facts are, but they can still be well- or poorly-supported. An informed opinion backed by evidence and sound reasoning carries more weight than an arbitrary one — so not all opinions are equal.
- What about "expert opinion"?
- Expert opinion is a judgment informed by deep knowledge and evidence. It’s still an interpretation, not a bare fact, but it’s generally more reliable than a casual opinion — while remaining open to challenge.