Deductive reasoning is best described as?

• A. Starting with a hypothesis or theory and testing it against evidence.
• B. Gathering data and letting the theory emerge.
• C. Randomly selecting data.
• D. Accepting beliefs without testing

Answer: (A)

Deductive reasoning starts with a general claim or hypothesis and uses it to predict specific outcomes, which you then compare with evidence. This top-down approach tests whether the general idea holds up in particular cases. For example, if you begin with the idea that all mammals have lungs, and you know this animal is a mammal, you would conclude it has lungs and then look for evidence to confirm that. If the evidence contradicts the conclusion, the general claim is challenged.

This is why starting with a hypothesis and testing it against evidence is the best description. Gathering data and letting theory emerge describes inductive reasoning, where observations lead to a general conclusion. Randomly selecting data isn’t a systematic method, and accepting beliefs without testing isn’t reasoning at all.