Simon Horobin, an English professor at Magdalen College, Oxford, asked the audience at the Telegraph Hay Festival: Do we really need the apostrophe?
He added that "sometimes we have to accept spellings change".
This was always likely to make pedants everywhere livid.
And sure enough, grammar Nazis were immediately out in force.
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You know what? They're right. Grammar is important. Forgetting a simple apostrophe can lead to this.
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And (shudder) all these.
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It's important to get your commas right, too.
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And don't just add quotation marks because you feel like it, you just sound sarcastic.
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And don't even get me started on overusing exclamation marks.
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So remember, be careful with your grammar. It really does a difference.