Fake news spreads through sharing links on social media. Evaluate before posting.
Fake news is spread through fake social media accounts powered by social bots. See The Rise of Social Bots
Social media platforms cultivate complex relationships with their users, who are both creators and consumers of content. Add integrated advertising (like sponsored posts) into the mix, and it can be daunting to figure out what's true.
Strategies for evaluating social media:
Not every image you encounter is so obviously FAKE as this quote above, attributed to Abraham Lincoln - so be skeptical with online images and photographs too!
Often photographs are recycled and/or doctored to fuel interest and provide visual "proof" for fake news. Knowing how to do a reverse image search can help you identify most photographs like this.
No, President Bush is not really trying to read a book upside down. This image is also FAKE!