Laterally search - copy/paste information from the original source into a search engine; if the same information comes up from multiple sources, you can most likely trust it. Make sure you are seeing more than one source, as the same sources may come up in your search.
Look for hyperlinks in the source (links that connect documents and other articles together on the web). Hyperlinked information act as references, where you can click to see a bigger picture of the information mentioned or to read more.
