In 1954, Winston cigarettes launched an ad so controversial broadcasters refused to say it on the air.
But the uproar had nothing to do with the dangerous product being advertised.
People were appalled by the ad's grammar, specifically using like as a conjunction instead of as.
Grammatical incidents like this have caused outrage in various regions and languages for centuries.
But while we know people take grammar seriously, what's less clear is why.
Where do these seemingly random rules come from?
And which, if any, actually matter?
The answers to these questions vary from rule to rule, so let's look at three particularly famous English examples.
First up, the idea that you should never end a sentence with a preposition.
Prepositions are small, common words like with, on, for, or to that often come before nouns.
