Westernattention, focus
Signal vs Noise
You cannot see the signal until you remove things
3 min read
One hundred and fifty marks. Somewhere in here is a signal.
What it says
Much of what competes for attention can be noise relative to a particular decision: plausible, urgent-sounding, but not useful to the question at hand. Signal is the information that changes that decision. The distinction is not an intrinsic property of a message. The same detail may be irrelevant to one question and decisive for another.
The working idea here is subtraction. Attention cannot expand to meet every possible demand, so choosing a direction also means choosing what not to pursue. That includes attractive alternatives, not just obviously bad ones. Focus has a cost: something worthwhile remains undone so that something else can receive enough sustained attention to become good.
That is what the visual above argues by demonstration: stare at the full field and there is nothing to see. Filter it, and a shape was there the whole time.
A practical way to explore the principle is to name one question before collecting more information. Suppose a team wants to understand why a form is being abandoned. A change in completion rate, a reproducible error, or a reader's account of a confusing field might affect the next decision. A stream of unrelated feature requests might not. Narrowing the question gives each incoming detail a job to do.
But filtering is not the same as dismissing disagreement. A rule that removes every awkward observation can make a wrong idea feel wonderfully clear. Useful filters need a way back out: revisit the question, inspect a sample of what was excluded, and look deliberately for evidence that would change the decision. Simplicity is valuable only when it preserves what matters.
The diagram is an analogy, not a model of how all knowledge works. Its signal is deliberately fixed in advance. In real work, the shape may not be known, and some apparent noise may reveal a better question. Use the interaction to notice the relief of a less crowded field, then remember the judgement hidden behind the filter. Removing marks is easy. Choosing what deserves to remain is the part that requires thought.
How I use it
A personal note on using this principle is still being written.
Where it comes from
This is an interpretation of Steve Jobs's focus philosophy, not a formal framework published under this name. In his 1997 speech to Apple employees, preserved in the Steve Jobs Archive's Make Something Wonderful, he describes cutting the product roadmap and concentrating on fewer products. The filtering diagram and examples here illustrate that principle; they are not Jobs's own diagram or an exact quotation.