Credentials count for something, but authority in academic writing is established sentence by sentence, through the specific choices an author makes about how to present evidence, qualify claims, position arguments, and engage with the work of others. Those choices are stylistic in the narrow sense. They involve word choice, syntax, and structure. They are also intellectual, because they are the mechanisms through which the argument is built and the author's relationship to the field is defined.
Ownership of style is the degree to which the writing sounds as if it was produced by someone who thought carefully about every choice. Most authors do not achieve it on a first draft. The first draft is where the thinking gets done, and the writing that comes out of it carries all the marks of thinking in progress: the false starts, the over-explanation, the hedges that made sense when the argument was uncertain and need to go now that it is settled, the passive constructions that were useful when the author was unsure who the agent was and now obscure an agency the study has established. Revision is where ownership is claimed. The author goes back through the thinking and makes it read as though it was always this clear.
An automated tool cannot help with this. It can mark the passive constructions, but it cannot tell which ones should be made active and which are passive for a reason. It can identify the hedge without knowing whether the hedge is intellectual cowardice or intellectual precision. It can note that a sentence is long; whether the length is a failure of control or an expression of it, the tool has no way to judge.
A human editor can tell these things apart. Not infallibly — editing involves judgment, and judgment involves the possibility of error — but with the discipline-aware, argument-sensitive attention that separates a correction from a mistake. The editor's job is to help the author find the clearest, most authoritative version of the style that is already there, asking at every turn whether a sentence is doing what the author intends and telling the sentence that needs to be fixed from the sentence that is already right. A manuscript that reaches a committee or a journal with that kind of attention behind it reads differently from one that was processed and submitted.
In practice, ownership of style means that every word in the final manuscript reflects a deliberate choice the author can stand behind, whether or not she wrote every word without assistance.
