What is the positive meaning of doubt in scientific thinking?

Correct answer: Examining evidence before accepting a claim

The direct answer is B: examining evidence before accepting a claim. Scientific doubt is a careful, constructive habit. It does not mean being negative or refusing to believe anything; it means asking what evidence supports a statement, whether the method is reliable, and whether other explanations are possible. Step by step: someone makes a claim; the scientist does not accept or reject it immediately; they inspect observations, measurements, methods, and repeated results; then they form a conclusion that matches the available evidence. Option A, “opposing everything,” is wrong because science does not require automatic disagreement. Option B is correct because it describes questioning a claim responsibly before accepting it. Option C, “never drawing any conclusion,” is wrong; science can reach temporary, evidence-based conclusions, while remaining open to better evidence. Option D, “calling all experiments wrong,” is also unreasonable because well-designed experiments can provide useful knowledge. Scientific doubt improves accuracy and protects us from accepting rumours, bias, or unsupported statements. Memory cue: doubt asks “What is the evidence?”—it does not simply say “No.”