Valid Argument Forms

Vriver01

I'm just going through the lesson on Valid Argument Forms now and I was wondering for which questions are the existential quantifiers relevant? I guess I'm just having a hard time visualizing how learning the different valid forms will help to different between Logical Reasoning questions types.

sweetsana_27

well the valid argument forms are used on the must be true questions. And the valid argument forms have both existential and universal statements. For example look at this valid argument form:

A some B --> C
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A some --> C

The some parts are the existential statements, and the universal statements are the arrows which basically means "ALL". So that statement is read as: Some A's are B's and all B's are C's. Therefore some A's are C's.

And also All implies most, and most implies some. So remember that as well when picking answer choices.

Vriver01

Thanks!