Artificial intelligence may need a colonoscopy.
Not the kind you think of that involves the nasty preparation. I'm speaking about the punctuation mark: Two periods, stacked on top of each other to indicate that you're introducing a list, an explanation, a quotation or are giving examples.
Let me talk out of school (a saying I've never fully understood: I know what it means, but I don't know why "talking out of school" would mean sharing insider information. Were we supposed to never talk about school subjects when we were outside of the school walls? Was learning about the 50 states or how to determine the area of a triangle or how to conjugate verbs some secret that we were supposed to keep from our parents? "Talking out of school": Weird saying).
Anyway, let me get to the point on colons: At my workplace, I often review work done by others (not professional writers) and I can tell when they used the company-approved AI tool. People smarter than me (definition of "people smarter than me": Nearly everyone) probably have other examples of how AI writes, but the most obvious to me is the love of colons in writing headlines or subject lines (one possibility: It's informed by the other work done within our company, so colons are already prevalent).
The AI tendency echoes the growing trend among media companies, who have learned that colons can save space in headlines – or make something seem more dramatic. If the president says the economy is doing well, one headline could be "President says economy is doing well," while another seems more dramatic: "President: Economy doing well."
At newspapers, colons are handy because you limited space (measured by columns) to write headlines (A favorite headline as a sports editor: "A's/tip/M's." You could use large type for that one, even over one column!) But more and more media sites are online only and they have more room for headlines (or "titles" as nonjournalists will often call them. When that happens, journalists snicker and mock you. Journalists: Snarky jerks).
I'm not opposed to colons, because they're handy. But when I look at an article with a series of subheads that all have colons, I suspect that person used AI to write the subheads.
When it comes down to it, colons are handy and are easy to rewrite. You can take the colon-filled title and just add a few words and make it work. Again, I'm not opposed to colons.
Now time for a side trip: I'm strongly opposed to semicolons, the shape-shifters of the punctuation world. There's an official purpose for semicolons: Linking two independent sentences that are closely related or to separate items in a list that already has commas.
The second one is obvious: "He eats peanut butter, banana and jelly sandwiches; jelly beans; pizza; cheese and crackers; and cold cereal." The first? Who determines whether the sentences are independent and closely related? Not me.
The official Stanhope System for Semicolons: Use semicolons on lists that already have commas. Use long dashes to set off independent sentences that are closely related.
Merriam-Webster gives an example that I can also use to support the Stanhope System. They provide an example: "Semicolons are useful; they show that clauses are related in meaning." I would rewrite that as "Semicolons are useful – they show that clauses are related in meaning." Stanhope System: Dashes are better than semicolons.
Back to AI in writing. I presume some AI writing is good (my guess is that I've read many things – not necessarily at work, but in the wild – that are well-written and by AI). Side note: I prefer dashes to parentheses, although I used both in the previous sentence. Anyway, to continue a paragraph that could be a longer sentence with the proper use of semicolons, colons are helpful, but also a signal that you may be relying on something else to do your work.
Colons: A possible canary in the coal (colon?) mine for headlines and titles for writers.
Colons: I've now used 20 in this column.
Reach Brad Stanhope at bradstanhope@outlook.com.

