P2-b Omit any comma that sets off a restrictive word group.

Printed Page H-55

A restrictive word group distinguishes the noun it modifies from similar nouns or precisely defines its distinguishing characteristics. See P1-c for a review of nonrestrictive word groups that need commas.

If a comma incorrectly sets off a restrictive word group, it undermines the meaning, suggesting to the reader that essential information is not important.

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