Day 78: Put complex items at the end of a series.

From the reader’s perspective, series can be confusing. They have to figure out what connects to what. This is one reason why we recommend putting commas after every item but the last. Series are most confusing when some of the items are complex. Consider this sentence.

“The plan called for 25 people, 2 weeks, and the expertise, obviously, of the human resources department.”

The complex item here is “the expertise, obviously, of the human resources department.” If we write this part as the first or second item in the series, the potential for reader confusion increases. The reader will have to decide where the item begins and ends because of the extra commas.

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Putting this item at the end removes any confusion about where it ends (because nothing follows it), and the sentence is clearer.