Valid vs Invalid Argument forms

mjjohns6

I was wondering what's the purpose in memorizing all 9 valid argument form and all 7 invalid argument forms? Is it mainly for Parallel and Parallel Flaw question types?

ddakjiking

I just went over those lessons today. Knowing the valid and invalid argument forms come in handy whenever anything needs to be diagrammed. It certainly can be useful for Parallel and Parallel Flaw as they tend to be more time-consuming than others, but other question types like Must Be True (MBT) and Sufficient Assumption (SA) often use such argument forms.