Based solely on the provided article body, artificial intelligence (AI) is a set of algorithms that mathematically models relationships between data and calculates the most probable answer, while natural intelligence is the information-processing capacity of the human brain, which contains approximately 86 billion neurons. The fundamental difference is that natural intelligence is alive, while artificial intelligence is a simulation. A human feels, suffers, fears, regrets, feels shame, and experiences guilt, whereas artificial intelligence experiences none of these. For example, an AI system may generate the sentence “I am sorry,” but it does not truly feel sorrow because the sentence is merely a statistically appropriate sequence of words. Ethics is the systematic study of right and wrong.