The language of expertise online is worth examining separately from expertise itself. The two are not the same thing. A writer can have genuine expertise — deep knowledge, hard-won experience, careful thinking — and communicate it in ways that undermine its credibility. A writer can have modest expertise and communicate it in ways that project authority far beyond what the knowledge warrants. The language of expertise is a performance, and like all performances, it can be examined independently of what it represents.
This matters because online writing has produced a set of conventions for signalling expertise that have become so widely adopted that they now function as a substitute for it. The conventions are learnable. The expertise is not. And a reader who cannot distinguish between the two — who mistakes the performance of authority for authority itself — is making decisions based on a signal that has been decoupled from what it was supposed to indicate.
How Language of Expertise Online Gets Performed
The performance of expertise online tends to cluster around a recognisable set of moves.
The first is the confident assertion without qualification. Expertise performs itself as certainty: “Here’s what actually happens”, “The truth is”, “What most people get wrong”. These phrases signal that the writer is above the common misunderstanding, in possession of the correct view. They are useful when the writer is, in fact, in possession of the correct view. They are misleading when the question is genuinely uncertain or contested — when the confident assertion is performing knowledge that does not exist.
The second move is the credentials display: the mention of years of experience, of clients worked with, of problems solved. This is not inherently problematic — credentials are relevant information — but online credentials displays tend to be structured to impress rather than to inform. The writer who spent “fifteen years in the industry” may have spent fifteen years doing something that does not bear on the current subject. The display of experience is not the same as evidence that the experience is relevant.
The third move is the framework: the writer who presents their thinking as a system — “The Three Pillars of X”, “My Five-Step Process for Y” — signals that their knowledge is organised and transmissible. Frameworks are useful when the underlying thinking warrants them. When the framework is imposed on thinking that does not justify it, it produces the appearance of rigour without the substance.
What These Conventions Do to the Reader
The conventions of online expertise are not neutral. They train the reader to respond to the performance rather than to the content — to mistake confident assertion for correctness, credentials display for relevant experience, and framework for genuine insight.
This is a problem for the reader who wants to learn something rather than to be impressed. The reader who is looking for genuine expertise needs to be able to distinguish it from its performance. But the conventions make this harder, because they have been optimised for persuasion rather than for accuracy. A writer who has mastered them can project authority across almost any subject, regardless of what they actually know.
There is also a subtler effect on the writer. A writer who has learned to perform expertise tends to produce writing that is more confident than their knowledge warrants — and confidence, once established as a habit, is hard to modulate. The writer who has learned to assert without qualifying finds it difficult to introduce the uncertainty that genuine expertise often requires. Real expertise tends to come with an awareness of what is not known, of where the evidence is thin, of where the question is harder than the answer. The performance of expertise tends to suppress all of this.
What Genuine Expertise Looks Like in Writing
Genuine expertise does not use the language of expertise online in the way its performance does. It tends to be less confident in register, not more — because the writer who actually knows a subject knows where its edges are, and writing honestly about a subject requires acknowledging those edges.
It tends to qualify more, not less. The expert who says “the evidence suggests, though does not conclusively establish” is not hedging out of weakness. They are being accurate about what is known. The non-expert performing expertise tends to flatten this uncertainty because uncertainty does not project authority.
It tends to be more specific. The writer with genuine expertise can give precise examples, exact figures, particular cases — not because precision signals expertise, but because precision is what knowing a thing in detail makes possible. The performance of expertise tends towards generality, because generality is easier to sustain across a range of subjects.
And it tends to acknowledge difficulty. The question that has no clean answer, the trade-off that cannot be resolved, the case where the usual approach does not work — these are the signs of a writer who has spent enough time with a subject to know where it gets hard. They are also the signs that are most reliably absent from the performance of expertise, because difficulty does not project confidence.
The language of expertise online has become sufficiently standardised that it functions as a genre — a set of conventions that can be learned and applied regardless of what the writer actually knows. Recognising the genre is not the same as being able to identify genuine expertise within it. But it is a starting point.
A reader who knows what the performance looks like is better placed to ask whether there is anything behind it.