What is AI?

• That's a pretty difficult question, but a good approximation to an answer is systems that might help you pass the Turing Test.
• A list of some of the things that I would include (though others might not) is:
• Knowledge Representation,
• Machine Learning,
• Robotics, Computer Vision, Information Retrieval, and Natural Language Processing.
• I'm pretty broad with this, but it is a matter of opinion.
• There are no necessary and sufficient conditions.