Fallacy Theory Evaluating Arguments
Formal Fallacy (Structure Flaw) Affirming the Consequent: if A then B, B, thus A invalid version of Modus Ponens (affirming the antecedent) Courtney will go to the
RULES OF INFERENCE: Rules that can be used to derive
either a conclusion directly or a series of intermediate conclusions that link the
premises of an argument with the stated conclusion
Rules of Impl
*All of these are informal fallacies
Fallacy/Fallacy
Type
Definition
Example
These fallacies share the common characteristic
that the arguments in which they occur have
premises that are logically irr
2. Derivation Tips for Predicate Logic
(1)
A common mistake I saw on the fourth exam (on predicate logic):
Applying the instantiation & generalization rules to p
arts of a statement.
Recall that the