In a valid deductive argument, all of the content of the conclusion is present, at least implicitly, in the premises. Deduction is nonampliative. Induction is ampliative. The conclusion of an inductive argument has content that goes beyond the content of its premises. If the premises are true, the conclusion must be true.
Valid deduction is necessarily truth preserving .
A correct inductive argument may have true premises and a false conclusion. Induction is not necessarily truth preserving . Deduction is erosion-proof. New premises may completely undermine a strong inductive argument. Induction is not erosion-proof .