To ensure robust decision-making, Eclipse requires that if a partner feels strongly against a potential investment, they must join the deal team alongside the champions. This forces a direct confrontation of the risks and ensures that by the time an investment is made, all major concerns have been addressed.

For an investment firm, the investment committee is not just a decision-making body. It's the primary venue where analytical rigor, debate style, and lessons from successes and failures are transmitted from senior leadership to junior members, shaping the firm's core identity.

FanDuel CEO Amy Howe adopted this McKinsey principle, which requires even junior employees to voice contrary opinions. This creates an environment where diverse perspectives are heard, ultimately leading to more robust and well-vetted company decisions.

To avoid an echo chamber when starting GQG, Rajiv Jain deliberately hired experienced long/short investors instead of his former team. He reasoned that a team that grows up with you will think like you, while outsiders with diverse experience are more likely to disagree and challenge assumptions.

To improve decision-making, BlackRock's investment committee, guided by a behavioral scientist, uses autonomous voting to prevent peer pressure. It also mandates a non-voting "challenger" to play devil's advocate and champion a pre-mortem perspective, ensuring dissent is valued.

Venture firms have processes like investment committees to prevent bad decisions. However, to generate exceptional returns (alpha), an investor must ultimately trust their own unique point of view, even when it differs from the consensus. This contrarian thinking is what firms hire new talent for.

Asset managers can avoid recycling old ideas by running a parallel institutional research service. The need to deliver fresh ideas to sophisticated, paying clients who challenge assumptions creates a powerful forcing function for continuous, contrarian idea generation that benefits the asset management side.

Lagarde champions cognitive diversity by deliberately placing an "outlier" in her teams—someone with a different background and thinking style. She believes the friction and "irritation" they cause is essential for challenging assumptions and preventing dangerous consensus.

To avoid dangerous groupthink when a deal appears overwhelmingly positive, GSP's leadership actively employs a "think again" process. They encourage dissent and re-examination of assumptions, viewing deals where everyone agrees as potentially the most dangerous.