When a product team debates which features to cut, the fight is rarely about the features. It's about whose story of the user gets to win. The 18th-century Scottish philosopher Thomas Reid noticed something that modern product managers keep rediscovering: perception is not passive reception — it's active construction, shaped by what he called 'acquired perception,' the layer of interpretation we've built so invisibly through experience that we mistake it for direct observation. A veteran engineer 'sees' technical debt everywhere; a growth PM 'sees' conversion friction; a designer 'sees' cognitive load. None of them are lying. Each has trained their perceptual system to foreground different signals from the same reality. Reid's insight — that our professional expertise is literally changing what we see, not just what we think — reframes the classic roadmap disagreement. The problem isn't prioritization. It's that you're trying to reconcile four different sensory worlds. One practical move: before your next roadmap session, ask each person to describe the specific user moment they're optimizing for, in narrative detail, before any feature is named. You're not seeking consensus — you're making the invisible perceptual frames visible so you can actually compare them.

In the last product decision you were part of, whose account of the user's experience went unexamined — and why did everyone treat it as ground truth?

Drawing from Scottish Common Sense Philosophy / Perceptual Epistemology — Thomas Reid (Essays on the Intellectual Powers of Man, 1786)