symbolic AI, which uses human-understandable symbols and rules, and subsymbolic AI, which draws inspiration from the human brain and uses numerical computations. The narrative highlights the early optimism and subsequent "AI winters" caused by unmet expectations. The text also explains the perceptron, an early example of subsymbolic AI, and its limitations, which contributed to the decline in subsymbolic AI research. Finally, it emphasizes the surprising difficulty of seemingly "easy" tasks for AI, underscoring the complexity of human intelligence.