First, presentations are notoriously terrible for testing business viability. The reason is that they are far too ambiguous. A lawyer needs to see the actual proposed screens, pages, and wording. A marketing leader wants to see the actual product design. A security leader needs to see exactly what the product is trying to do. Presentations are terrible for this. In contrast, high‐fidelity user prototypes are ideal for this. I plead with product managers in larger companies to not trust a sign‐off on anything other than a high‐fidelity prototype. I have seen far too many times where the execs
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