Some Valid and Invalid Forms

I found that the section about some valid and invalid forms of argument was very interesting. The section discussed the direct way of reasoning with all (All S are P, a is S, so a is P.), arguing backwards with all (All S are P, a is P, So a is S.), and a couple others. It helped me to see even more how wee use diagrams to make things even more clear than we originally plan to make them. Also this section helped me realize that if you truly have trouble figuring out if the argument is valid or invalid you can always draw a diagram, but the diagram might be tricky if you do not know how to properly draw one. This section made setting up a diagram easy by giving guidelines. The guidelines on checking for validity with diagrams made it easy because it gave useful tips on what should go in the bubbles/boxes, what each one needed to have in it, and where it should be placed (overlapping, next to each other, etc.). From personal experience, if I cannot understand something or have trouble deciding whether something is valid or not, I found drawing the diagram helps tremendously. I remember using one to help me narrow down what colleges I wanted to look at and which ones were right for me.