Ever since modern symbolic logic was consolidated (in the mid 1900s), the standard format for an introductory logic class has been to learn the classical predicate calculus in three steps: ...

First of all, identify the overall logical structure of the sentence ... Exercise 2.6.1 Display the propositional form of the following argument. Does it seem valid to you? Does it convince you that ...

How can one demonstrate that an argument or inference is not valid? The course begins with a simple system called sentential or propositional logic, which despite its simplicity captures a significant ...