Informal Logic 101: How to Think and Argue Better, Part 2 | A View from the Right

“Having, then, once introduced an element of inconsistency into his system, he was far too consistent not to be inconsistent consistently, and he lapsed ere long into an amiable indifferentism which to outward appearance differed but little from the indifferentism….”  — Samuel Butler, iconoclastic Victorian author

balding guy scratching head in confusionDespite what you might think from the heading, this post has nothing to do with friends, dating, or marriage. Besides, we all know that logic goes out the door when it comes to that stuff…. 😉

In my initial post for this series, we examined the three founding principles of logic: the Law of Noncontradiction, the Law of Excluded Middle, and the Law of Identity. Now, we will look at the next level of basic principles necessary to get a handle on critical thinking — namely, the four types of logical relationships:

1) Contradictory
2) Contrary
3) Subcontrary
4) Subalternation

Read the rest: Informal Logic 101: How to Think and Argue Better, Part 2 | A View from the Right.