Where's the moat? A live-debate class on durable vs. fake advantage

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1. For the instructor

This is a ready-to-run 75-minute class you can teach cold, with no prep. Students look at one composite (invented) company, decide which of its advantages would actually survive a well-funded rival, and defend that call out loud against the rest of the room. It is built for a wide, mixed group: no business background is assumed, every term is defined the first time it appears, and the work is done in small tables so quiet students can contribute through their group.

A moat — the one idea the whole class turns on — is a plain word for a structural reason a company can keep making good money while rivals who want that money try, and fail, to take it. The picture is a castle (the profits) with a moat around it (the thing that keeps rivals out). The trap the class exposes: the advantages that feel strongest — a hot new feature, fast growth, being first — are usually the easiest to copy, and the real moats are quiet.

What’s in the pack: this run-of-show (section 4), the concepts you need and nothing more (section 5), a group exercise with a facilitator answer key you can run without being a strategy expert (sections 6-7), Socratic debrief prompts (section 8), a printable student handout (section 9), a stretch for fast tables (section 10), and a slide outline you can present straight from (section 11).

How to run it in a mixed room: keep tables to 3-5 students, mix majors on purpose, and make each table commit to a call before the debate — the learning is in defending a decision, not in finding the “right” word. There is no single correct feature to name; there is a most defensible reading, and section 7 gives it to you along with what each other choice would cost.

A note on the clock. The run of show is a tight 75 minutes with little slack — in a 30-40 student room budget ~85 minutes in practice (set-up, table-forming, and the debate always run long). If you fall behind, cap presenters at two tables and cover two discussion prompts. Protect the group exercise and the debrief — those are the session.

One honest line, say it aloud at the start: this is teaching material, not a certification and not a credit-bearing course. It builds the skill of judging a competitive advantage; it does not issue any credential.

2. Session at a glance


Audience	Capstone / mixed majors; no business background; built for live debate
Class size	12-40 (tables of 3-5)
Total time	75 minutes
Materials	Printed student handout (section 9); board or slides (section 11); a timer

By the end students can:

Name the five real sources of a durable advantage (network effects, switching costs, cost advantage, intangible assets, efficient scale) and point to which one a company actually has.
Tell a moat from a mirage — separate a durable edge from a hot product, a first-mover lead with no lock-in, or growth alone — and say why each mirage fades.
Make and defend one call: where the company’s next dollar should go to keep a funded rival out.

Further reading (the anchor “Decide” course): Where’s the moat? Telling a durable advantage from a good quarter (projects/wheres-the-moat) — the self-study version students can work through alone after class.

3. The case

FitLoop is a composite (invented) company; every figure below is illustrative and chosen for clean reasoning, not drawn from or claimed about any real firm.

FitLoop is a phone app in one mid-size city. It lets people book a single class — a spin session, a yoga mat, a boxing hour — at any of the city’s independent fitness studios, and pay per class instead of joining one gym. Members love the freedom; studios love the extra customers who fill otherwise-empty slots. FitLoop just had its best year. Here is what the leadership team is proud of (all figures illustrative):

Item	Figure (illustrative)
Independent studios listed on FitLoop	40 studios
Active members booking through the app	25,000 members
Revenue growth this year	70%
Monthly member churn (members who stop booking)	8%
Average class history + saved credits a member holds in the app	~18 months
Share of a partner studio’s bookings that now come through FitLoop	~30%

Then the news breaks. PulsePass, backed by a large national gym chain, launches in the same city. It offers a free 30-day pass, undercuts FitLoop on price, and — within two weeks — ships a copy of FitLoop’s most-praised feature, a “workout streak” tracker that members had been raving about. FitLoop’s leadership wants to respond by racing PulsePass on app features.

The head of strategy has to answer a harder question first: of everything FitLoop points to as its advantage, what is actually durable — would still hold a year from now against a funded rival — and where should the next dollar go to keep PulsePass out? That is the call the class will make.

4. Run of show

8 min — Hook. Pose the situation aloud (or read Slide 2): FitLoop had its best year, then a funded rival copied its best feature in two weeks. Quick hands-up poll: “Should FitLoop race PulsePass on features — yes or no?” Note the split on the board; you’ll return to it.
10 min — Frame + teach. Walk section 5’s concepts using Slides 3-5: what a moat is, the five sources, and the three mirages. Keep it fast — the tables will use the ideas, not memorize them.
5 min — Set up the exercise. Hand out the worksheet (section 9). Read the task: for each of FitLoop’s six facts, label it moat or mirage, name the source, and pick where the next dollar goes. Assign tables.
22 min — Group work. Tables argue it out and fill the worksheet. Circulate; use the “steer a stuck table” notes in section 7. Each table must commit to one dollar-allocation call.
15 min — Structured debate. Line the room up on one axis — tables that chose (b)/(c) (invest behind the moat) versus tables that chose (a)/(d) (match the rival / buy time) — and have the two camps challenge each other. Force each side to name what the other choice would cost.
10 min — Debrief + reveal. Walk the facilitator answer key (section 7) and Slides 6-8. Return to the opening poll and ask who changed their mind and why.
5 min — Takeaway + close. Land the one-sentence takeaway (section 8) and point students to the anchor course for solo practice.

Total: 75 minutes.

5. Teaching points

Teach only these — they are everything the section 7 call needs.

Moat. A structural reason a company keeps earning good returns while rivals cannot take them. “Structural” means built into the situation, not just a smart team or a nice product — a rival can hire talent and copy a product, so those are not moats. Test: if you cannot say what structurally stops a rival, you have not found a moat.
The five sources of a moat. A durable advantage almost always comes from one of these:
- Network effect — each new user makes the product more valuable to the other users, so the product already ahead gets better just by being bigger. (FitLoop’s studios and members can form this: more studios make the app more useful to members, and more members make it more useful to studios — a two-sided network.)
- Switching cost — everything a customer would lose or spend to leave: data, history, retrained habits, reconnected systems. High switching costs mean a customer can prefer a rival and still not move.
- Cost advantage — a structural reason you can serve customers cheaper and sustain it. A discount funded by an investor is not this — it is a subsidy that ends when the money does.
- Intangible asset — something a rival cannot legally or practically copy: a patent, a licence, or a brand (a reputation strong enough that customers pick you without re-checking rivals).
- Efficient scale — a market just big enough for one or a few players, so a new entrant cannot also reach profitable size and rationally stays out.
The three mirages — real strengths that are not moats on their own:
- A hot product / feature — loud now, copyable later (PulsePass copied the streak in two weeks).
- First-mover advantage with no lock-in — being first only lasts if it builds a network or a switching cost; a head start alone gets erased by a better-funded entrant.
- Growth alone — growth measures how fast you add customers, not how hard you are to displace. It is an outcome, not a cause.
Durability test — for any advantage, ask three things: (1) which of the five sources is it? (2) what would a funded rival have to do to breach it — copy a feature (easy) or rebuild a network of thousands (hard)? (3) what one change would breach it fastest? If you cannot answer, it is probably not a moat.

6. Group exercise

The task. Your table is FitLoop’s strategy team. PulsePass has entered. You must decide where FitLoop’s next dollar goes — and be ready to defend it against a table that chose differently.

Handout: use the worksheet in section 9. Work in these steps.

(Label each fact — together) Take the six facts from the case (studios, members, growth, churn, saved history, share of studio bookings). For each, write moat or mirage, and if moat, name which of the five sources it is.
(Find the breach) For every fact you called a moat, write one sentence: what would PulsePass have to do to break it? “Copy a feature” is easy — mark that a mirage. “Rebuild a network of 40 studios and 25,000 members” is hard — that is a moat.
(Make the call) Pick ONE place for the next dollar: (a) race PulsePass on app features, (b) sign more studios and deepen the two-sided network, (c) make member history and studio schedules harder to leave, or (d) match PulsePass’s free pass with discounts. Circle one.
(Prepare to defend) Write one sentence on what your call costs — what you give up by not choosing the others. You’ll say this out loud in the debate.

Every table must commit to one lettered call before the debate. There is no prize for the “right” letter — the point is the reasoning.

7. Facilitator answer key

The defensible call: (b)/(c) — invest behind the durable network and switching costs, not (a) feature-racing or (d) price-matching. Here is why, and what each option would cost.

Run FitLoop’s facts through the durability test. The two-sided network (40 studios drawing members, 25,000 members drawing studios) is a real, if early, moat: PulsePass cannot copy it by shipping a feature — it would have to rebuild relationships with dozens of independent studios and tens of thousands of members, which is slow and expensive. The saved history and the 30% share of studio bookings are switching costs: members lose ~18 months of progress if they leave, and studios have woven FitLoop into how they fill classes — softer than a business migrating years of records, but real. Those are the durable advantages.

Push on the switching-cost claim — this is the sharpest teaching moment. The 8% monthly churn is easy to wave past, but it compounds: about 62% of members leave over a year (roughly six in ten). That number undercuts the lock-in story — if the saved history really trapped members, they would not be walking out the door at that rate. The honest read: the switching cost is soft and leaking, not a wall. It is still a real advantage worth deepening (that is exactly why (c) is on the table), but a table that labels churn a “mirage / strength” without noticing it contradicts their own lock-in claim has missed the point. Reward the tables that spot the tension.

Now the mirages. The streak feature is a hot product — PulsePass copied it in two weeks, so it protects nothing alone. 70% growth is an outcome, not a cause; it measures speed of adding members, not how hard they are to take. Being first matters only because it built the network, not on its own. FitLoop has no cost advantage (PulsePass, funded, is the cheaper player), and its efficient-scale story just broke — PulsePass entering proves the market was big enough to draw a rival.

What each option costs. (a) Feature-racing spends the whole budget defending the copyable advantage and drags FitLoop into a features-and-price war a funded chain can win — the trap the leadership fell into. (d) Matching the free pass burns cash to defend nothing structural; the moment discounts stop, the members leave. (b) Signing more studios and (c) deepening lock-in (exclusive local studios, deeper scheduling integration, portable member history that is painful to abandon) are the only dollars that widen the advantages PulsePass cannot copy. The cost of (b)/(c) is real — it is slower and less visible than a flashy feature, and it may lose a few price-sensitive members short-term — but it is the only spend that builds a wall instead of a drawbridge everyone can see.

Concede the strongest version of (a)/(d) gracefully. A sharp student may argue: “the network is still early, our lock-in is leaking (see the churn), and PulsePass is funded — if it out-networks us before our moat deepens, there is no moat left to defend. So spend on features or a free pass now to buy time, then build the moat behind that cover.” That is a genuinely strong argument, not the trap — it is really the section 10 “flip,” and it turns on timing: is PulsePass close to reaching network scale first? Grant it fully. The counter is not “you’re wrong,” it is: features and discounts buy time only if the money then flows into (b)/(c); spent on features as the strategy, they buy nothing that lasts. So the defensible resolution is that (a)/(d) can be a short bridge, never the destination. If a table argues that cleanly, mark it a win.

Steering a stuck table. If a table is dazzled by the 70% growth, ask: “how fast you grow, or how hard you are to take — which is the moat?” If a table wants to match the free pass, ask: “what happens the day the discount ends?” If a table calls the streak feature a moat, point at the two-week copy. If a table is torn between (b) and (c), that’s fine — both defend durable advantages; accept either as the call.

Run the debate on one axis. Since (b) and (c) are both defensible, do not pit them against each other — the room goes flat. Instead line the tables up as (b)/(c) — invest behind the moat — versus (a)/(d) — match the rival / buy time, and make each camp name what the other camp’s choice costs. That is the fault line with real disagreement, and it forces out the timing argument above.

8. Discussion & debrief

Run these after the tables report out:

Which of FitLoop’s six facts fooled your table first — and what tipped you off it was a mirage?
PulsePass copied the streak feature in two weeks. Name one thing it couldn’t copy in two years, and say why.
A member says: “I’d switch to PulsePass — it’s free — but I’d lose my history.” Is that a moat or just a mild annoyance? What would make it a strong moat instead of a soft one?
If PulsePass built a one-tap tool that imported your FitLoop history for you, which of FitLoop’s advantages would survive?
Growth of 70% and a national-chain rival both showed up this year. Why can both be true at once — and what does that tell you about reading growth as safety?

One-sentence takeaway: A moat is what a funded rival still can’t take from you next year — not the thing that looks strongest in this year’s numbers.

9. Student handout

FitLoop — the situation (composite; all figures illustrative). FitLoop is an app in one city that lets people book single fitness classes at independent studios, pay-per-class. Its best year:

Item	Figure
Independent studios listed	40
Active members	25,000
Revenue growth this year	70%
Monthly member churn	8%
Avg. class history + saved credits per member	~18 months
Share of a studio’s bookings coming through FitLoop	~30%

PulsePass, backed by a national gym chain, just launched here: a free 30-day pass, lower prices, and a copy of FitLoop’s popular “workout streak” feature within two weeks. Leadership wants to race PulsePass on features.

Your task. For each fact, decide: moat (a funded rival can’t easily take it) or mirage (looks strong, easily copied)? Then pick where the next dollar goes.

The five moat sources: network effect · switching cost · cost advantage · intangible/brand · efficient scale. The three mirages: a hot feature · first-mover with no lock-in · growth alone.

Fact (the six from the case)	Moat or mirage?	If moat: which source?	What would PulsePass do to break it?
40 studios listed
25,000 members
70% growth
8% monthly churn
~18 months saved history
30% of studio bookings via FitLoop

Bonus (do this if you have time): the “streak” feature — moat or mirage? What did PulsePass do to it? _________________________________________________

The call — circle one. Where does FitLoop’s next dollar go?

(a) Race PulsePass on app features (b) Sign more studios, deepen the network (c) Make history + studio schedules harder to leave (d) Match the free pass with discounts

Defend it. In one sentence, what does your call cost — what are you giving up? ______________

10. Stretch

For tables that finish early:

Stack the moats. FitLoop’s network (studios + members) and its switching costs reinforce each other — the longer a member stays, the more history they hold and the more studios they’ve booked. Sketch how two moats compound into one deeper than either alone.
Flip the call. What single fact, if you learned it, would make feature-racing (option a) the right answer after all? (Hint: think about what would have to be true about PulsePass’s network or FitLoop’s switching costs.)
Moat into liability. Those ~18 months of saved history protect FitLoop today. Describe how a new “let me export my data in one tap” law could turn that same history into the thing that lets PulsePass win — and what FitLoop should build now so the law widens its moat instead.

11. Slides

Slide 1 — Where’s the moat?

A 75-minute live-debate class on telling a durable advantage from one that only feels durable.
Presenter note: say the honest line — this is teaching material, not a certification or credit.

Slide 2 — The situation: FitLoop

Composite app: book single fitness classes at independent studios, pay-per-class.
Best year ever: 40 studios, 25,000 members, 70% growth.
Then PulsePass (national-chain-backed) enters: free pass, lower price, copies the best feature in two weeks.
Presenter note: poll the room — “race PulsePass on features, yes or no?” Mark the split.

Slide 3 — What is a moat?

A structural reason a company keeps earning while rivals can’t take it.
Not a moat: a smart team, a nice product, a good quarter — all copyable.
The test: what structurally stops a rival?

Slide 4 — The five real sources

Network effect · switching cost · cost advantage · intangible/brand · efficient scale.
If you can’t name which one a company has, it probably has none.

Slide 5 — The three mirages

A hot feature (loud now, copied later) · first-mover with no lock-in · growth alone.
All real strengths; none durable by itself.

Slide 6 — Your call

Label FitLoop’s six facts: moat or mirage. Then pick where the next dollar goes: (a) features (b) more studios (c) deeper lock-in (d) match the free pass.
Presenter note: every table commits to one letter before the debate.

Slide 7 — The defensible read

Durable: the two-sided network + switching costs (history, 30% of studio bookings).
Mirages: the streak feature, 70% growth, first-mover. No cost advantage; efficient scale just broke when PulsePass entered.

Slide 8 — What each option costs

(a) defends the copyable edge, invites a war a funded chain wins.
(d) burns cash for nothing structural.
(b)/(c) build the wall PulsePass can’t copy — slower, quieter, durable.
Presenter note: land the takeaway — a moat is what a funded rival still can’t take next year.

12. Sources & license

The FitLoop and PulsePass case, and every figure attached to it, is composite — invented from ordinary, realistic dynamics for clean teaching, not drawn from or claimed about any real company. Full provenance and the framework references are in SOURCES.md beside this file.

Data line: all figures are illustrative and purpose-built. This module uses no real-company data and names no real firms.

License & disclaimer: classroom use is governed by the canonical classroom-use license and disclaimer maintained in company/legal/classroom-license.md — see that file for the binding wording; instructors should not substitute their own. In plain terms: this material is provided as-is, for teaching; it is not a certification and carries no guaranteed outcomes. It teaches a way of judging a competitive advantage — it does not promise any result, credential, or standing.

Instructor teaching material, provided as-is. Not accredited, not a certification, and not affiliated with or endorsed by any university. Uses composite (invented) companies and illustrative figures.