Complexity is just a cover-up for mediocrity—simplicity is the true pass for experts! William of Ockham proposed in 1285: 'Entities should not be multiplied unnecessarily.' This principle, originally used in logic, was later adopted by scientists like Newton and Einstein to build theoretical frameworks. In the investment world, Buffett invests 90% of his assets in S&P 500 index funds, rejecting complex hedge strategies and frequent trading. The simpler the investment, the easier it is to succeed. Complex operations are often just a way to hide ignorance.