Inductive and deductive reasoning differ in which way?

Deductive reasoning uses premises and a logical structure intended to make the conclusion necessarily follow. When the argument is valid and its premises are true, the conclusion must be true. Inductive reasoning generalizes from observations, so its conclusion may be likely but is not guaranteed. Thus the best choice is “Conclusions drawn using deductive reasoning are always valid, while conclusions drawn using inductive reasoning may or may not be valid.”

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