I often find myself reading comments from past lessons, some dating back one or two years—sometimes even eight. By now, those people are likely in law school or already practicing as lawyers. It’s inspiring to think that the comments we leave today might one day be read by future generations on the same journey. And when that time comes, I hope that we—each of us striving for this goal—will be in law school, well on our way to becoming lawyers.

Conditional Argument: If one lives in New York City, then one lives in United States.

When you want to find the Contrapositive you flip and negate. Why?

If we just negated without flipping it, it would say:

If one does not live in New York City, then one does not lives in United States.

This wouldn't make sense, because they can be in Los Angles, Texas. Just because they are not in New York, does not mean they can not be living anywhere else in United States.

But look if we negated and flipped what would happen:

If one does not live in United States, then one does not live New York City.

This would make sense because you cant be in New York without being in United states.

there is also this method that you can use that says "why should I believe that?"

Try it out!

Not every mammal is suitable to keep as a pet.

Why should I believe that?

Because Tigers are very aggressive and can cause serious injuries to people (premise support)