It seems like an entirely arbitrary example, but also seems like one that is ubiquitiously taught and repeated over and over.
He didn't invent peanut butter. Marcellus Gilmore Edson did.
The textbook league has spent time and resources on documenting bad science, bad history, bad astronomy and suchlike in American textbooks.
While browsing through their archives, I noticed that some stories were repeated in several books.
Empak Publishing's A Salute to Black Scientists and Inventors 1985, for example, seems to hold a bunch of fairy-tales - some might be true, but some are definitely completely taken from the imagination of the author.
Unfortunately, these stories are really good. So good, that textbook writers couldn't help themselves, but have included them as a "Multicultural Opportunity" in several textbooks.
If you browse their archives, you'll see that the same misinformation reappears in several books - one might suspect that you could tell if a person had gone through the American school system, by how likely they are to use Bernoulli's principle as an explanation for any given observation.