The professors at Long-Term Capital Management believed that their sophisticated models could accurately predict the limits of human behavior in the financial markets. However, these models only suggested what might be considered reasonable or probable based on historical data. The crucial error made by the professors was their assumption that traders, like machines, would always act rationally in accordance with these predictions.

This misconception led to the downfall of Long-Term Capital Management. In reality, traders are influenced by emotions and social dynamics, often making decisions based on imitation and group behavior rather than pure logic. The lesson learned from this failure highlights the importance of recognizing the unpredictable nature of human behavior in the financial world.