/ dɪˈdʌktɪv; NAmE / adjective
[ usually before noun ] using knowledge about things that are generally true in order to think about and understand particular situations or problems :
deductive logic / reasoning
—compare inductive
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WORD ORIGIN
mid 17th cent.: from medieval Latin deductivus , from deduct- deduced, from the verb deducere , from de- down + ducere lead.