The concepts of a technological singularity and an AI apocalypse refer to the hypothetical scenario where artificial intelligence systems become sentient and make independent decisions that directly impact human lives, potentially leading to humanity's manipulation or destruction. The textbook notes that these fears are frequently raised in non-technical discussions. However, such a scenario requires artificial general intelligence, which does not currently exist; modern AI systems are engineered, goal-oriented tools based on rules, heuristics, and statistical models, rather than self-improving, sentient entities.