No one would try to be a carpenter without knowing how to use a hammer and saw. No one would claim to be a software developer without the ability to write syntactically correct code that (usually) does what it’s supposed to. But it’s astonishing how many people on writers’ forums show a basic lack of ability to use their language.

As a writer, you should understand spelling, verb tenses, sentence structure, agreement, and so on. You should have a good vocabulary and know what the right word is. You can break the rules when it’s appropriate, but you should know when you’re breaking them and why. You should know the difference between “rein” and “reign,” between “lose” and “loose.”

Grammar checkers won’t save a bad writer. The best of them are excessively nitpicking, ridiculously permissive, or both in turns. They’re valuable for catching mistakes, but you have to know which of their recommendations are valid.
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