The Red String meme, also known as Pepe Silvia, originates from a 2008 episode of the sitcom It's Always Sunny in Philadelphia. In the scene, Charlie Kelly, portrayed by Charlie Day, has a manic breakdown in a mailroom while attempting to uncover a non-existent conspiracy involving a man named Pepe Silvia. The visual of Charlie gesturing wildly at a bulletin board covered in pinned papers and connecting red yarn became an instant internet sensation. It is now the go-to format for mocking conspiracy theorists, over-analyzers, and anyone trying to explain a logic that only makes sense to them.