Prescriptive and descriptive approaches to grammar

Are these grammarians telling us how people should speak, or describing how people do speak? That distinction makes the opening much easier. Prescriptive grammarians identify correct usage and encourage it. Descriptive grammarians observe usage within a community without treating preservation of a preferred form as their task.

“Prescriptive” works the same way in an ordinary recommendation: saying that someone should exercise tells them what to do. Saying how often they exercise describes what they do. Applied to language, the difference concerns whether the grammarian should direct usage or record it.

The prescriptivists think guidance prevents a changing language from falling into disorder. Notice that they already acknowledge change. They don't have to deny that language changes in order to want to regulate its direction. Descriptivists argue that attempts to prevent change are unscientific and likely to fail.

The data example makes the dispute concrete. In Latin, “data” is plural, with “datum” as the singular. Prescriptivists therefore object to “the data is incomplete.” Descriptivists respond that English speakers have come to use “data” as a singular mass term, like “water.” If people consistently use and understand a word that way, trying to force it back into its earlier form may be pointless. Knowing where a word came from and deciding that its origin must control current usage are different things.

The second paragraph gives us two objections. The scientific objection says language changes according to laws that people cannot resist, much as they cannot defy gravity. The egalitarian objection says an educated, wealthy elite is imposing its own habits on everyone else. Keep those separate: one challenges whether regulation can work; the other challenges whether imposing it is morally acceptable.

We can react to the second objection without deciding the whole debate. A rule's association with an elite does not, by itself, show that the rule is wrong or harmful. We still need to know what the standard does for the people expected to use it.

The final paragraph answers both objections. First, some attempts to regulate language have succeeded. Descriptivists might say the preferred usage would have prevailed anyway. That is a real causal distinction: if usage changed in the direction a rule recommended, the rule might have caused the change, or the change might have happened without it. The writer calls the second explanation an “article of faith” because the descriptivists have not established that the intervention made no difference.

Then the author explains why the gravity comparison is limited. Language depends on choices by people who can be persuaded. You cannot persuade gravity to behave differently; you can persuade someone to adopt a particular expression. This doesn't mean every grammar rule succeeds or that science has nothing to contribute. It means linguistic change isn't immune to human influence in the way the descriptivists' comparison suggests.

The last response addresses equality. Prescriptivists argue that a shared standard makes the free exchange of ideas possible. Its custodians may have elite characteristics, but their stated aim is inclusion. On that view, a common form of language helps people communicate across differences rather than excluding people from a privileged group.

So our main-point prediction should do more than name two schools. The author explains the disagreement, presents two objections to prescriptivism, and gives reasons those objections do not settle the issue against it. That defense doesn't require declaring every traditional usage rule correct.