Ask your top-performing sales rep how they handle a pricing objection.
They'll probably say something like: "I just listen, acknowledge where they're coming from, and redirect to value."
Ask them to show you. Watch what they actually do. It's faster than they described, more instinctive, and full of micro-adjustments they didn't mention — a pause here, a reframe there, a specific phrase they've used so many times it's become automatic.
Then ask a new hire to do what they just described.
It won't work. Not because the advice is wrong, but because the advice is incomplete in ways the top performer can't see.
The Curse of Knowledge
In 1990, a Stanford PhD student named Elizabeth Newton ran an experiment that became famous in behavioural psychology.
She divided participants into two groups: "tappers" and "listeners." Tappers were given a list of well-known songs and asked to tap the rhythm on a table. Listeners had to guess the song. Before the exercise, tappers were asked to predict how often listeners would guess correctly.
Tappers predicted 50%. The actual rate was 2.5%.
The tappers couldn't understand why. The song was so obvious — they could hear it clearly in their heads as they tapped. What they couldn't perceive was that to the listener, the tapping was just noise. The tune that felt so vivid to the tapper was entirely absent from the listener's experience.
This is the curse of knowledge: once you know something deeply, you lose the ability to imagine not knowing it. The expert's mental model is so fluent it's become invisible to them.
Your best reps have it badly.
What Experts Can't Explain
Top performers in any skilled domain — sales, medicine, sport, music — routinely outperform their ability to describe their own performance. The skills that separate them from average performers are often precisely the ones they've automated to the point where conscious access is difficult or impossible.
A great closer doesn't think about when to go quiet. They've just learned — through hundreds of repetitions — that silence creates space. Ask them about it and they might mention it, or they might not. It's not top of mind. It fires automatically.
This creates a real problem for coaching.
When a top performer coaches a junior rep, they're working from a model of performance that they can't fully articulate. They give advice that's accurate but incomplete. They demonstrate techniques that contain more information than their verbal explanation conveys. And they often can't recreate the difficulty of the skill — because to them, it isn't difficult any more.
Why Manager Role-Play Falls Short
Most sales coaching involves some version of manager-led role-play. The manager plays the prospect. The rep pitches. The manager gives feedback.
The problem isn't the format. The problem is who's playing the prospect.
A manager who knows your sales methodology, knows the answer the rep is supposed to give, and isn't a real buyer cannot produce the unpredictability that makes the skill hard. They'll push back in predictable ways. They'll give the rep cues — sometimes unconsciously — about where the conversation should go. And because the stakes aren't real, the rep's nervous system doesn't engage in quite the same way it does on a live call.
The result is that the rep gets feedback on a simulation that doesn't quite match the real thing, from a coach who can't fully articulate why the thing they're coaching for is the right approach, in an environment that doesn't adequately recreate the pressure of the live context.
This is not a criticism of managers. It's a structural problem. The people best positioned to coach the skill are precisely the people least able to explain or recreate the difficulty.
The Apprenticeship Illusion
There's a romantic version of skill development in sales culture: shadow a great rep, absorb what they do, and gradually become like them.
This works. Slowly, partially, in ways that are hard to attribute to the shadowing specifically.
What it can't do is compress the timeline. Watching a great rep handle a hundred calls gives you a mental model of what good looks like. It doesn't give you the hundred repetitions you need to build the automatic responses that fire under pressure.
The apprenticeship model trades on the assumption that observation translates to performance. It does — eventually, with enough time and enough live experience. But the transfer is inefficient, the timeline is long, and the quality of the experience depends heavily on who you're shadowing and whether they happen to face the situations you need to practice.
What Consistent Practice Actually Requires
The answer isn't to replace great reps as coaches. Their judgment, their pattern recognition, their ability to identify what a specific rep needs — these are genuinely valuable and hard to replicate.
The answer is to separate the coaching from the repetition.
Coaches identify what needs to change. Practice is where the change gets built. These are different activities, and conflating them is why most coaching feels like it works (the conversation is valuable) while producing slower skill development than it should (the rep doesn't get enough reps).
When practice is separated from coaching — when reps can run twenty objection scenarios without needing their manager free for an hour — the coach's time goes further. They're reviewing and directing, not providing the raw material. And the rep isn't dependent on their manager's availability or acting ability to get repetitions.
Your best reps are not your worst coaches because they're bad at coaching. They're your worst coaches when coaching is the only vehicle for practice.
Decibl gives reps the repetitions their manager doesn't have time to provide — realistic voice practice that builds the automatic responses coaching alone can't install.