PHL 104 Lecture Notes - Lecture 3: Modus Ponens, Modus Tollens, Hypothetical Syllogism
24 Feb 2017
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Some events are dependent or contingent on the occurrence of others. Antecedent: the first part of the statement. Consequent: the second part of the statement. If you are an lsu fan, then you must be disappointed. In a conditional statement, whenever the antecedent event occurs, so does the consequent event. Assuming the statement is true, that means all lsu fans are disappointed. And whenever the consequent event does not occur, neither does the antecedent event. And that anyone who isn"t disappointed must not be an lsu fan. If it rains, the ground will be wet. There are four kinds of reasoning with if/then statements. The conclusion is only valid when either: The second premise affirms the antecedent (states that the if condition is true) The second premise denies the consequent (states that the. The ground is wet, therefore it is raining. Chained conditionals are contingency relationships involving two if/then.
