You Cannot Interview for Execution. You Have to Watch It Happen.

After describing three traits he probes in conversation, emotional resilience, depth of knowledge, and the power to draw people to a mission, the author of a guide to spotting exceptional founders says the fourth cannot be tested with a clever question. "You don't ask. You watch."

Every founder says he moves fast and works hard, he writes. He does not take the claim at face value. What he is looking for is not speed alone, but what he calls "velocity in a direction," speed that points somewhere, toward a better product, faster learning, and a stronger team.

That means watching how a founder uses time over days and weeks. How quickly they turn ideas into working versions and ship them, how well they prioritize and decide with focus, and what they choose to ignore. He asks whether they get noticeably better from one week to the next, taking in feedback and learning quickly. He asks whether they can "compress time," getting a month of progress done in a week.

He also watches whether other people gather, whether people follow, whether they set a bar for the team, and what kind of energy they bring as leaders. In his language, this is screening for "slope + y-intercept," where they start and how fast they improve.

The evidence, he says, appears in texts, emails, updates, and signals of urgency. It is visible in how they pick their first priorities. "All of it compounds."

He contrasts interviews with behavior. As he puts it, "The best interviews reveal traits. The best founders prove them through behavior." "Founders can fake polish. Maniacs," his word for exceptional founders, "reveal themselves through execution." And when you find one, he writes, "you won’t need a rubric. You’ll just know."