Spotting fake Facebook posts: Keith Collins and Sheera Frenkel report that Facebook discovered hundreds of fake pages and user accounts this summer.

The New York Times reporters show real and deceptive posts, asking if you can tell which is fake. It isn’t easy.

The latest influence campaigns imitated post by legitimate pages and groups on Facebook that advocate political beliefs, they report, “amking it difficult to tell what was a genuine post and what was not.” Such campaigns also are known as online disinformation.