A guy is interested in taking another University course

So he goes to the one building on campus, and he sees a prof walking around.

"Hello sir, I would like to take on another course, but I don't know what to take. Which one do you suggest?"

*Well, we recently started doing a logic course. I think that's a pretty good one.*

"Well what exactly is logic all about?"

*Do you have a lawn mower?*

"Well yes, I do but what does this have to do with logic?"

*Well see it's like this. Because I know you have a lawn mower, I can assume you have a lawn. If you have a lawn, you probably have a house. I can relatively safely assume that you have a girlfriend, so you are heterosexual and you would one day want to have kids. That's logic.*

"That sounds amazing! Sign me up."

**Few days later**

So man I heard you are tking a new course?

"Yeah, it's logic. It's pretty cool."

So what exactly is logic?

"Well, do you have a lawn mower?"

No.

"Well if I follow a chain of assumptions, I eventually get to the conclusion that you're gay. That's logic."