Thanks are owed to Vice President Mike Pence for, at the outset of his debate with Senator Kamala Harris, making reference to "plagiarism, which is something Joe Biden knows a little bit about."
The lead front-page New York Timesnews article about the debate dismissed it as "Biden's 33-year-old plagiarism scandal."
In truth, he has dozens, probably hundreds, of bonehead ideas. But he has one such thought that stands out, because he publicly labeled it "bonehead" back in the 1980s. Of course, that's when his thought process was generally coherent. Usually wrongheaded, but at least intelligible.