What is AI?

This is a very interesting question, which doesn't have a unique answer. In fact, different answers lead to different aspects of AI. Let's explore some (of many) definitions that have been given by different scholars (in chronological order).

Actually, Russell and Norvig, in their book, organized these specific definitions into four categories. Here is their schema:

We don't have the time to go into detail about the question "What is AI?", since this could fill up another book on its own, but the last chapter of this book will also include some philosophical reference where you can expand your knowledge on this topic.