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Avoid comparing yourself to disciplines that operate under immutable physical laws; in Product Management you must accept uncertainty and build adaptive systems based on real data from your specific context.
Physics envy is the tendency of PMs to want absolute certainty like in exact sciences, but the product lives in a world of uncertain variables
Prioritize validating critical assumptions with real users before investing significant resources; direct conversation with customers reveals truths that historical data cannot capture.
Talk to your users, don't predict what they want based on theory or benchmarks from other companies
Design your roadmap as a set of falsifiable hypotheses rather than immovable commitments; communicate this clearly to stakeholders to avoid tension when reality requires changes.
Your roadmap is an instrument of learning, not a promise of exact delivery; the best PMs communicate this from the beginning
Measure the impact of product decisions with proxy metrics that reflect real user outcomes, not just activity; a poorly chosen metric can optimize you toward failure.
If you measure the wrong thing, you'll optimize toward the wrong thing; false metrics make you feel successful while you ruin the product
Communicating uncertainty is strength, not weakness; stakeholders respect a PM who says 'this is an experiment with risk' far more than one who hides assumptions under false confidence.
Be explicit about what you don't know and what you're assuming; transparency in uncertainty builds true credibility