What's the purpose of or?

Or is simply the word you use to give either a choice or to talk about two different things.

Explanation:

The first way to use "or"

"Hey, would you like to eat pizza OR tacos?"

A second way

"Ann said that she never took it. OR she could be lying to you so that she can keep it."

Does that make sense?

dramatic irony occurs when the reader/audience knows more about a character's situation than the character does. the one main effect is that it gives the reader a sense of superiority, or detached superiority. the reader not only seemingly discovers what is revealed, but feels superior for doing so.