Compare two founder snapshots and trace proposed features to the problems they assume

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<!doctype html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Equipment returns · Lean Canvas assumptions</title><style>*{box-sizing:border-box}body{margin:0;background:#f3f0e9;color:#443e34;font:16px/1.55 system-ui,sans-serif}main{max-width:1040px;margin:auto;padding:24px}h1{font-size:34px;line-height:1.16}h2{font-size:24px}h3{font-size:19px}.eyebrow{letter-spacing:.06em;color:#82735f}.card{padding:20px;margin:18px 0;background:white;border:1px solid #d1c6b1;border-radius:6px}.canvas{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.canvas button{text-align:left;background:#fff}.canvas strong{display:block}.canvas span{display:block;margin-top:10px}.tabs{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0}button,textarea{font:inherit;color:inherit}button{min-height:44px;padding:12px;border:1px solid #93805c;border-radius:4px;background:white;cursor:pointer}button[aria-pressed=true]{background:#7b653d;color:white}button:focus-visible,textarea:focus-visible{outline:3px solid #ad6020;outline-offset:3px}.link{background:#eef5ea;border-left:6px solid #799462}.snapshot{background:#fff8e6;border-left:6px solid #b58b38}label{display:block;font-weight:650;margin:14px 0 6px}textarea{width:100%;min-width:0;max-width:100%;min-height:95px;padding:10px;border:1px solid #a29378;border-radius:4px;resize:vertical}.copy p{white-space:pre-wrap;overflow-wrap:anywhere}#status{font-weight:650;color:#7a531d}footer{margin:24px 0;color:#7a705d}[hidden]{display:none!important}@media(max-width:650px){main{padding:12px}h1{font-size:28px}.card{padding:14px}.canvas{grid-template-columns:1fr}}</style></head><body><main><p class="eyebrow">HYPOTHETICAL CLUB EQUIPMENT RETURNS · FOUNDER WORKING COPY</p><h1>Which problem would the next feature address?</h1><p>Lean Canvas method by Ash Maurya. This original snapshot contains assumptions, not customer findings, pricing or a product-viability result.</p><section class="card"><h2>Nine blocks · inspect an assumption</h2><div id="canvas" class="canvas"></div><section class="card" aria-live="polite"><h3 id="block-title"></h3><p id="block-detail"></p></section><h3>Current unfair advantage</h3><p id="current-advantage" aria-label="Current unfair advantage: blank"></p><p>Blank until a defensible advantage is supported.</p><button id="history" type="button" aria-expanded="false" aria-controls="history-view">Inspect earlier advantage wording</button><section id="history-view" class="card" hidden><h3>Earlier wording · retained</h3><p>“We work hard.”</p><p>Unsupported as an unfair advantage. Effort does not establish what makes this offer difficult to copy. The current advantage remains blank.</p></section></section><section class="card link"><h2>Trace a proposed solution to its problem</h2><div class="tabs"><button id="p1" type="button" aria-pressed="true">P1 · overdue status</button><button id="p2" type="button" aria-pressed="false">P2 · reminder receipt</button></div><h3 id="problem">P1 · Coordinator cannot tell which items are overdue.</h3><p><strong>Proposed solution:</strong> <span id="solution">S1 · Return-status view.</span></p><p><strong>Open question:</strong> <span id="open">What causes the records and returned equipment to disagree today?</span></p><p>These are hypotheses. S2 is an idea, not a functioning message service. Discovering a different cause could change the solution discussion.</p></section><section class="card snapshot"><h2>Independent founder snapshots</h2><div class="tabs"><button id="snapshot-a" type="button" aria-pressed="true">Snapshot A · more reminders</button><button id="snapshot-b" type="button" aria-pressed="false">Snapshot B · trustworthy status</button></div><h3 id="snapshot-title">A · more-reminders framing</h3><p id="snapshot-problem">Founder assumption: borrowers need more equipment-return reminders.</p><p id="snapshot-solution">Proposed response: more reminders. Check whether reminder receipt matters to the coordinator's next action.</p><p id="snapshot-question">Open question: how is receipt handled now, and is it an important problem?</p><p>Both independent framings are retained in this page. Reconciliation is a discussion about evidence, not a vote establishing truth.</p></section><button id="discovery" type="button" aria-expanded="false" aria-controls="discovery-view">Inspect the next discovery question</button><section id="discovery-view" class="card" hidden><h2>Seek a concrete account of P1</h2><p>Describe the last time your records disagreed with the equipment that had actually been returned. How did you find the difference, and what did you do next?</p><p>Follow the actual process and alternatives. If there is no such example, record that rather than persuading the person the problem exists.</p><p><strong>Actual customer response:</strong> not supplied.</p></section><section class="card"><h2>Your separate canvas and next question</h2><div id="fields"></div><div class="tabs"><button id="build" type="button">Build assumption review</button><button id="reset" type="button">Reset typed work</button></div><p id="status" role="status"></p><section id="confirm" hidden><h3>Clear all ten canvas fields?</h3><div class="tabs"><button id="keep" type="button">Keep my snapshot</button><button id="clear" type="button">Clear typed canvas</button></div></section><section id="review" class="card copy" hidden><h3>Your supplied assumption snapshot</h3><div id="copy"></div><p>Working assumptions only. No demand, viability, payment or customer validation has been inferred.</p></section></section><footer>Temporary notes only. No real messaging, payment, storage or saved research. Keep independent framings beside later actual evidence.</footer></main><script>'use strict';const $=id=>document.getElementById(id),blocks=[['problem-block','Problem','P1: uncertain overdue status. P2: uncertain reminder receipt.','Both are problem hypotheses. Shared sheets and manual messages are proposed existing alternatives to investigate, not interview findings.'],['customer-block','Customer segments','Proposed payer: coordinator. Users: borrowers.','Early-adopter hypothesis: coordinators manually reconciling multiple weekly loans. Payer and user are distinct.'],['value-block','Unique value proposition','Return records easy to reconcile before the next club meeting.','A proposed outcome, not a guarantee.'],['solution-block','Solution','S1: return-status view. S2: proposed acknowledgment mechanism.','S1 maps to P1 and S2 to P2. 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