Lesson 1a: Sets

Most of the stuff I'll be doing has to do with something called "sets."  The meaning is deceptively simple:

A set is an unordered list of elements.

Simple, right?  No problem at all. But what's an element?  Again, not as complicated as it sounds.

An element is anything that is in a set.

Sets are indicated by capital letters, like A, B, C.  I'd hope that you'd know what a capital letter is.  Elements can be anything at all.