What's an 'incorrect promise'?

New York Times Public Editor Margaret Sullivan took the Times to task (too much alliteration?) in a blog post Wednesday for a recent Obamacare-related story in the paper that employed the puzzling phrase "incorrect promise."

The phrase was used to describe President Obama's oft-repeated (and since proven wrong) statement that nobody would lose their existing health insurance plans once Obamacare was implemented.

"It is an awkward phrase. What, exactly, is an incorrect promise, anyway?" Sullivan writes. "Something more direct like 'false promise' would have been both clearer and more accurate."

Sullivan previously criticized the Times for an editorial which described Obama as having "clearly misspoke[n]" when he made the promise.