What Is Critical Thinking?

Critical thinking is not criticism

Critical thinking isn’t a habit of doubting or attacking every claim you hear. More precisely, it’s a thinking habit that examines claims, evidence, assumptions, and context to reach a sound judgment.

People who think critically well aren’t cynics. If anything, they agree more strongly with good arguments, and they calmly ask what’s weak about weak ones. The point is scrutiny, not attitude.

Why it matters

We make judgment calls every day, buried in news, ads, comments, recommended videos, work reports, and casual advice. As the volume of information grows, the skill that matters isn’t knowing more — it’s knowing what to believe.

Situation	Critical thinking needed
Reading the news	Checking sources and evidence
Buying a product	Separating ad copy from actual terms
Sitting in a meeting	Checking whether claims match the data
Studying	Confirming a concept’s definition and scope

The basic procedure

First, identify what the claim actually is. Next, find the evidence backing it. Then check whether the evidence is sufficient, whether hidden assumptions are at work, and whether other explanations are possible. Finally, draw a provisional conclusion.

The word “provisional” matters here. Critical thinking isn’t clinging to a conclusion once you’ve reached it — it’s staying willing to revise your judgment when better evidence shows up.

An example

Take the claim “early risers are more successful.” First you need to figure out whether this is a claim, an anecdote, or a statistic. What counts as success? Does rising early cause success, or does it just correlate with it? Does the answer depend on occupation or life circumstances?

Key takeaways

• Critical thinking is a habit of examining claims and evidence, not a habit of criticism.
• The more information we face, the more judgment about what to believe matters.
• Confirm the claim, then check evidence, assumptions, and alternatives before reaching a provisional conclusion.
• Good critical thinking revises its conclusions when better evidence appears.

Next chapter: the most basic reading skill — telling claims, evidence, and assumptions apart.