2 Basic Types of Reasoning. Deductive Inductive. Deductive Reasoning. Attempts to provide sufficient (or conclusive) evidence for the conclusion Deductive reasoning can be recognized by the structure of the argument and sometimes by the conclusion offered. Inductive Reasoning.
There are some argument form that are always valid
They are: Modus Ponens, Modus Tollens, Categorical Syllogism, Disjunctive Syllogism, Hypothetical Syllogism and Constructive Dilemma
There are two argument structures that are always invalid.
They are: Affirming the Consequent and Denying the Antecedent