(CNN) It took Facebook more than a day to downgrade a doctored video making House Speaker Nancy Pelosi look like she was slurring her words -- and the video itself remains on the site, with copycats proliferating. But it wasn't until after 9 p.m. on May 23, some 32 hours later, that Facebook began suppressing the video after a fact-check from one Facebook partner, LeadStories, was published. But fact-checking a post or video takes precious time, during which rumors and misinformation can continue to spread at internet speeds. It also notifies Facebook users who share or have shared that content that it is false, said Facebook in a statement. Yet the altered Pelosi video remains available on Facebook, the company said, because it does not violate the platform's community standards.

Source: CNN May 25, 2019 18:00 UTC