adjective

deductive

dih-DUK-tiv/dɪˈdʌktɪv/

Using general principles to reach specific conclusions.

The teacher uses a general rule about squares to demonstrate deductive reasoning.

Three small cards form a clear logical progression: “All squares have four sides.” then a drawing of one blue square, then “This has four sides.” A teacher points from general rule to particular shape and conclusion.

Etymology

deLatindown

+ductLatinto lead

+iveLatincharacterized by

The image of “leading down” became “deriving” and then “inferring logically.” Deductive reasoning leads from accepted general principles to the particular conclusions that follow from them.

In context

Wireless Philosophy7:50

supposed to be deductive, but careful consideration of the argument reveals that in fact the premises don't guarantee the[br]truth of the conclusion

CRITICAL THINKING - Fundamentals: Introduction to Critical Thinking [HD]

More examples

The proof follows a deductive argument from its stated assumptions.
A deductive conclusion must follow from the premises.
She contrasted deductive reasoning with generalizing from examples.

Forms

deductive

deduction noun — a conclusion derived from premises

Similar words

inductive: Inductive reasoning generalizes from observations; deductive reasoning derives conclusions from premises.
logical: Logical follows sound reasoning generally; deductive identifies a particular direction of inference.