Talk:Discrete Mathematics/Naive set theory

I was only thinking to avoid using word "simple" and "it's just" in the theory of sets. Please leave the readers decide about the complexity of the concept. For instance: "The cardinality of a set, denoted |S| is simply the amount of elements a set has". That's not simple. Cardinality is very complex concept and word "simple" does not help, only mislead the reader to actually pay attention to it.