When interviews and references leave you with ambiguity about a candidate, move beyond conversation. Invite them to analyze or work on a live investment or project. Observing their thought process and how they "underwrite" a decision provides unparalleled clarity on their actual abilities.

Figma avoids "fast one" hires by engaging candidates for extended periods (9+ months). They provide deep, transparent access, even sharing raw data from Salesforce, to ensure the executive fully understands the company's challenges before joining, leading to better long-term fit.

To truly assess collaboration and skill, Linear replaces traditional final interviews with a 2-5 day paid project. Candidates work on real, shippable tasks, allowing Linear to evaluate not just the final output but also the collaborative process and communication style.

A common hiring mistake is prioritizing a conversational 'vibe check' over assessing actual skills. A much better approach is to give candidates a project that simulates the job's core responsibilities, providing a direct and clean signal of their capabilities.

To avoid hypothetical interview questions, Zipline makes its hiring process as applied as possible. This includes pair programming, collaborative design sessions, and even offering paid 1-2 week work trials. This "work together" approach quickly reveals a candidate's true fit and capabilities.

Instead of asking hypothetical questions, present senior candidates with a real, complex problem your business is currently facing. The worst case is free consulting; the best case is finding someone who can implement the solution they devise.

For high-level leadership roles, skip hypothetical case studies. Instead, present candidates with your company's actual, current problems. The worst-case scenario is free, high-quality consulting. The best case is finding someone who can not only devise a solution but also implement it, making the interview process far more valuable.

For roles where skills are difficult to assess in standard interviews, Clay implements a 2-3 week paid "work trial." This allows the company to evaluate a candidate's actual performance and fit on real tasks before extending a full-time offer, de-risking the hiring process for complex positions.

Simulation-based training isn't just for post-hire practice; it's a powerful tool for talent evaluation. By having candidates run through realistic role-playing scenarios during the interview process, companies can better assess their skills and predict on-the-job performance before making an offer.