"Fewer" and "Less" Is a Rule Someone Made Up in 1770 - Grammar Simplified: Master English Rules

The rule as usually taught: fewer for things you can count, less for things you cannot. Fewer cars, less traffic. Fewer coins, less money.

It is a useful distinction and worth keeping. It is also, unlike most grammar rules, something we can date almost exactly.

Where it came from

In 1770 a writer named Robert Baker published Reflections on the English Language, a book of observations about usage he personally found untidy. On less, he wrote that fewer would be better before plural nouns, and — this is the part usually left out — he framed it as his own preference rather than a rule.

Grammar books copied it. Then other grammar books copied those. Within a century a personal aesthetic judgement had become something taught to children as a law of the language.

Before 1770, less had been used with countable nouns for roughly nine hundred years. It appears that way in Old English, in Alfred the Great, and throughout the literature that grammarians of Baker’s era held up as models.

The exceptions that were never exceptions

If the rule were a genuine feature of English, it would apply consistently. It does not, and the places it fails are revealing:

Distance: less than three miles, never fewer than three miles.
Time: less than two hours.
Money: less than fifty pounds.
Weight: less than ten kilos.
Percentages and statistics: less than 40 per cent.
The fixed phrase: one less thing to worry about.

Miles and hours are countable. Every style guide permits less with them anyway, because the phrase refers to a quantity treated as a single amount rather than a collection of separate items.

Which suggests the real distinction was never countable against uncountable. It is individual items against a measured amount — and that version has no exceptions, because it is describing what speakers actually do.

The supermarket sign

No discussion of this survives without 10 items or less, and the argument about it is more interesting than it looks.

The prescriptive complaint is that items are countable, so it should read 10 items or fewer. The counter-argument is that the sign means a basket totalling ten items or a smaller amount than that, treating the ten as a measured threshold rather than ten separate objects — precisely the case where less is standard.

Several British supermarkets changed their signs after campaigns. Most changed them to up to 10 items, which sidesteps the question entirely and is arguably the best writing of the three.

What to actually do

Observe the rule. That is the honest recommendation, and the history does not change it.

Not because less with countables is wrong — it has nine centuries of precedent — but because a large number of educated readers have been taught that it is, and will notice. Using fewer costs you nothing. Using less costs you a small amount of credibility with a portion of your audience. That is an easy trade.

Where the rule and idiom collide — distance, time, money, weight, percentages — follow idiom. Fewer than three miles is not hypercorrect so much as simply wrong; nobody says it.

Why the history is worth knowing anyway

Because it changes how you hold the rule.

Someone who thinks fewer is a law of English will correct less than three miles and be wrong. Someone who knows it is a convention with a known author and known exceptions will apply it where it helps and leave it where it does not.

That is the difference between following a rule and understanding one — and it is the difference between correcting someone usefully and correcting them into an error.