Question

In order to prove that an argument is invalid using a truth table, one must __________. find a line in which all premises and conclusion are false find a line in which the premises are true and the conclusion is true find a line in which the premises are false and the conclusion is true find a column in which the premises and conclusion are true none of these

Answer 1

An argument can be considered invalid if the premises and conclusion are false, and the premises are true but the conclusion is false. Therefore, the answer that would best complete the statement above is the first option. In order to prove that an argument is invalid using a truth table, one must find a line in which all premises and conclusion are false. Hope this helps.