It is in the dictionary. That does not settle the argument, and understanding why is more useful than knowing which side you are on.

“I didn’t see nothing” is not bad mathematics. It is a grammatical feature of many English dialects, and once it was standard everywhere.

Roughly one sentence in ten in published English begins with a conjunction. The prohibition was a teaching shortcut that outlived its purpose.

The rule comes from a poet in 1672 who thought English should sound more like Latin. Nobody has been able to make it work since.

It sounds more careful than “between you and me”, which is exactly why it is wrong. This is what a hypercorrection is and how to spot your own.

The most repeated instruction in creative writing is usually explained badly. What it actually asks you to do is give up a particular kind of adjective.

English puts adjectives before the noun in a fixed sequence. Most of the world’s languages do neither. This is what learners are actually up against.

“He walked slowly and quietly into the room” has two modifiers doing a job one verb could do better. The adjective is often a symptom, not the problem.

Happier, but more careful. Simpler, but more modern. The rule is about syllables, except when it is about something else entirely.

Frugal or stingy. Confident or arrogant. Determined or stubborn. The same behaviour, three verdicts, and the choice is never neutral.