Wednesday, October 20, 2010

General Claims

A) In Chapter 8, I learned about how the words all, same and only can be the deciding factor on if a claim is true or false.
- Using the word ALL, means "every single one", and that one is at least present.
- SOME means one or more, but not every single one.  
By using these words, it helps create general claims. When general claims are made, it is hard to come up with a contradictory counter argument.
Ex:  Paranormal Activity   is a scary movie. Paranormal Activity isn't scary to everyone.
*Some would come up with a contradictory: "Paranormal Activity is scary to everyone." This is wrong, it should be: "The movie Paranormal Activity is a scary to some people."
B) Validity is a direct way of reasoning with the word "all."
A way to check validity is to draw a diagram.
-What ever circles drawn represents a collection
- One collection is completely inside the other collection circle
-If these circles over lap eachother, that means they have something in common.
-A dot inside the circle will represent a certain object is in that collection
-Now you identify the premises that are true while also showing the conclusion that is false
Ex of valid: All my cats stay indoors. Kell Is my cat. So Kell stays indoors.
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