Warren Buffett's investment approach?

Jim O'Shaughnessy offers insights into Warren Buffett's investment approach, emphasizing the importance of adhering to principles that are "approximately true on average over time". He mentions how Warren Buffett values patience, sticking to a robust investment strategy of buying undervalued stocks even when the market behaves irrationally. This principle, O'Shaughnessy agrees, is a robust way to approach investing because over time, it tends to yield positive results despite temporary market inefficiencies or anomalies 1.