A critical thinker does not accept information at face value but questions sources, considers evidence, and evaluates arguments before forming conclusions.

The speaker assumes that one person's behavior represents all teenagers, which is a hasty generalization fallacy. A critical thinker recognizes that one example does not prove a universal claim.

Confirmation bias causes us to seek out and remember information that supports what we already believe, while ignoring contradictory evidence. Critical thinking requires actively fighting this tendency.

Critical thinkers always evaluate the quality of evidence. A study with only 10 people over 2 days is too small and short to draw meaningful conclusions. Ask about sample size, duration, and whether results have been replicated.

This is the classic "correlation does not equal causation" error. Two events can happen at the same time without one causing the other. The rooster crows BECAUSE the sun is rising (or due to other factors), not the other way around.

An ad hominem (Latin for "to the person") fallacy attacks the person making an argument instead of addressing the argument itself. A person's appearance, character, or background does not automatically make their evidence wrong.

The scientific method follows a logical sequence: observe something you want to understand, form a hypothesis (educated guess), experiment to test it, analyze the results, and draw a conclusion. This process helps eliminate bias.

Critical thinkers evaluate source credibility. Anonymous authors with no expertise should be treated skeptically. Look for information from reputable medical organizations like the CDC, WHO, or peer-reviewed medical journals.

A sound argument needs: a clear claim (what you're trying to prove), logical reasoning (how you connect evidence to your claim), and credible evidence (facts, data, expert testimony). Missing any element weakens the argument.

Critical thinking is a skill that improves with practice. Regularly asking "why," "how do we know," and "what's the evidence" trains your brain to think more deeply and avoid accepting claims without examination.