The "Inversion" or "Failure Analysis" mental model is a problem-solving approach that involves examining a situation from the opposite end. Instead of directly asking how to succeed, it encourages thinking about how to avoid failure. By identifying all possible causes of failure, potential obstacles, and negative outcomes, individuals can proactively mitigate risks and thereby increase the likelihood of achieving their goals. This reverse-thinking method supports a more comprehensive assessment of situations and leads to wiser decisions.