The Feynman Technique for Actuarial Concepts

The Four Steps of the Feynman Technique

The Feynman Technique, named after physicist Richard Feynman who was renowned for his ability to explain complex ideas simply, has four steps. First, choose a concept you want to understand deeply, such as "Buhlmann credibility," "option pricing," or "Markov chain transition probabilities." Second, explain it in plain language as if teaching someone with no actuarial background. Write out your explanation on paper or speak it aloud. Third, identify gaps where your explanation breaks down, gets vague, or resorts to jargon you cannot define. Fourth, go back to the source material, fill those gaps, and simplify your explanation further until it flows clearly from beginning to end.

The power of this technique lies in its ruthless honesty. When you read a textbook and nod along, you feel like you understand. But when you try to reconstruct the idea from scratch without any reference material, the gaps in your understanding become immediately obvious. These gaps are precisely the areas where exam questions will catch you.

Why It Works for Actuarial Exams

Actuarial exams test understanding, not just memorization. A question about net premium reserves will not simply ask you to state the formula. It will present a scenario that requires you to understand what the reserve represents, why it changes over time, and how different assumptions affect the calculation. When you can explain net premium reserves without jargon, connecting the concept to its underlying logic, you truly understand it at the level the exam demands.

This technique exposes what cognitive scientists call "illusions of competence." These are situations where you recognize material when you see it but cannot reconstruct it from scratch. Recognizing a formula on the page feels like understanding, but it is fundamentally different from being able to derive and apply that formula in a novel context. The Feynman Technique forces you to cross the gap between recognition and genuine comprehension.

Applying the Technique to Specific Actuarial Topics

For probability concepts tested on Exam P, try explaining conditional probability and Bayes' theorem to an imaginary friend who understands basic arithmetic but nothing about probability theory. You might start with: "Conditional probability tells us how to update what we expect when we learn new information." Then walk through a concrete example, such as the probability that a randomly selected insurance claim is fraudulent given that it was filed within 90 days of policy inception. If you cannot explain why the formula works and not just state the formula itself, you have found a gap to fill.

For financial mathematics on Exam FM, explain the concept of present value to someone unfamiliar with finance. Why is a dollar today worth more than a dollar next year? How does compounding work, and why does continuous compounding produce a different result than annual compounding? Walk through the logic behind annuity formulas. If you find yourself saying "you just use this formula" without explaining where it comes from, that is a gap worth addressing.

For upper-level exams, the technique becomes even more valuable because the concepts are more complex and interconnected. Explaining credibility theory, for instance, requires you to articulate why we blend individual experience with group experience, what the credibility factor represents, and how the Buhlmann model improves on limited fluctuation credibility. Each of these sub-explanations is a test of your understanding.

Practical Methods for Using the Technique

There are several practical ways to implement the Feynman Technique in your study routine. Writing explanations in a dedicated notebook is the most straightforward approach. Keep a "teaching journal" where you write one-page explanations of key concepts after studying each topic. Date each entry so you can revisit them later and see how your understanding has evolved.

Recording yourself speaking is another effective method. Set a timer for five minutes and explain a concept out loud as if presenting to a class. Listen to the recording afterward and note where you hesitated, used filler words, or skipped over important details. These moments of hesitation map directly to gaps in understanding. Many candidates feel awkward recording themselves at first, but the quality of the feedback makes it worthwhile.

Explaining concepts to a study partner combines the Feynman Technique with social accountability. Take turns being the "teacher" and the "student." The student's job is to ask genuine questions, especially "why does that work?" and "what happens if we change this assumption?" These questions push the teacher deeper into the material than a solo explanation would. If you do not have a study partner, explaining concepts to a family member or friend who is not in the actuarial field can be equally effective because their questions come from genuine unfamiliarity rather than shared knowledge.

Identifying and Filling Gaps

The places where your explanation stumbles are exactly the topics that need more work before exam day. Common types of gaps include the following. Definitional gaps occur when you use a term you cannot precisely define, such as saying "it converges" without being able to explain what convergence means in the specific context. Logical gaps occur when you state a result without being able to explain why it is true, such as knowing that diversification reduces portfolio variance without being able to show mathematically why. Connective gaps occur when you understand two related concepts individually but cannot explain how they relate to each other, such as understanding both annuities-immediate and annuities-due but being unclear on the precise algebraic relationship between them.

When you identify a gap, return to your textbook or study manual and focus specifically on that gap. Do not reread the entire chapter. Find the paragraph or derivation that addresses the specific point of confusion, study it carefully, and then attempt your explanation again. This targeted review is far more efficient than rereading material you already understand.

Integrating the Technique Into Your Study Schedule

You do not need to apply the Feynman Technique to every concept you study. Reserve it for the most important and most challenging topics. A practical approach is to spend 10 to 15 minutes at the end of each study session writing a Feynman-style explanation of the most important concept you covered that day. This serves as both a comprehension check and a review exercise.

As your exam date approaches, revisit your teaching journal and re-explain concepts you wrote about weeks or months earlier. If your explanation has improved, that confirms genuine learning. If it has regressed, you have identified a topic that needs additional review. This longitudinal use of the technique gives you a powerful diagnostic tool for assessing your readiness across the full syllabus.