What do Nerds Eat for Lunch?

I just received this invite to a lunch today. The emphasis in the message is mine.

From: ______________ Sent: Tuesday, February 02, 2010 9:04 Subject: BRAG Lunch today The BRAG Lunch is a monthly, informal round-table lunch for developers within the Greater Baton Rouge area. It is FREE and open to developers of all skill levels. ______________ will be starting us out talking on the Liskov Substitution Principle and we'll see where we go from there. Should be yet another great meeting. If you would like to come, please use the eventbrite link below to register so that we can get a rough estimate of the space needed. We hope to see you there!

Liskov Substitution Principle?

Let's go to Wikipedia:

In object-oriented programming, the Liskov substitution principle (LSP) is a particular definition of a subtyping relation, called (strong) behavioral subtyping, that was initially introduced by Barbara Liskov in a 1987 conference keynote address entitled Data abstraction and hierarchy. It is a semantic rather than merely syntactic relation because it intends to guarantee semantic interoperability of types in a hierarchy, object types in particular.

Well, I hope I would be able to hang in the "we'll see where we go from there" part of the conversation, because I don't see myself elaborating on the nuances of Liskov.

Unfortunately, I have something that I have to do at lunch today. But hey, it's nice to be invited.