The Factual Core is a pink-eyed core who rapidly rattles off multiple erroneous historical, mathematical, and scientific facts in Portal 2. He speaks a lot of statements that are often wrong, such as: "Dreams are the subconscious mind's way of reminding people to go to school naked and have their teeth fall out." or "To make a photocopier, simply photocopy a mirror."
It describes itself as "the most intelligent and handsome sphere," while insulting the Space Core, the Adventure Core, and even Chell. Although it never says that its name is Craig, it can be assumed from the core's statement that "the world's best name is Craig," that if it had a name this would be it.
This core is voiced by Nolan North, who also voiced the Adventure Core and Space Core.