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Logic is a powerful tool; it can be used to discern and to discover truth. Sometimes, though, this tool falls into the hands of those who would abuse it. Armed with the laws of logic and a few simple, plausible, and apparently harmless assumptions, philosophers can construct proofs of the most absurd conclusions. These proofs can give us pause; should we believe the unbelievable?
Logical Paradoxes - StumbleUpon
Toulmin's argument model
Stephen Toulmin, an English philosopher and logician, identified elements of a persuasive argument.Introduction to Logic Sample Quizzes
Quizzes are an opportunity to master concepts in logic well in advance of tests. Logic is a difficult course to learn in a short period of time. Logical terminology is generally difficult to understand in a short period of time, and the use of quizzes helps to provide some measure of conceptual understanding prior to tests. The quizzes given here are those used in past classes and are not necessarily similar in form to those prepared for this semester.
critical thinking - module three - section two
introduction to diagramming In this module we examine the structure of arguments in more detail.