Friday, July 16, 2010

Interesting Concept: Aristotelian Logic - Categorical Claims

An interesting concept I found in the textbook are about categorical claims. They are claims that are developed from Aristotle’s method which was known as the Aristotelian logic. It had become a very important method used to analyze reasoning. According to Epstein, categorical claims are claims that can be “rewritten as an equivalent claim with one of the following standard forms”:

All S are P
Some S is P
No S is P
Some S is not P

Here are a few examples for each of them. These claims can be rewritten as an equivalent claim to make them become categorical:

All dogs bark. = All dogs are things that bark
Some dogs eat human= Some dog is a thing that eats human
No dogs climb trees = No dog is a thing that climbs trees
Some apples are not red = Some apple is a thing that is not red

We don’t want to have to always use the phrase “thing that” so we can also write these claims another way:

All dogs are barkers
Some dog is a human eater
No dog is a tree climber

1 comment:

  1. I did this topic for my second question. I thought it was very interesting method of explaining a claim. And this was made way long ago which makes it even more cool.

    Although it hard to understand first, I easily got it when I saw an example. It presents an interesting way of how to show an argument rather than just having a one sentence claim thing which can be boring sometimes. I like how you gave two examples to explain this topic and your definition of aristotlian logic because it was really clear and easy to understand. This is a good tool for an argument.

    ReplyDelete