The line is tied in meme culture to Senator Steven Armstrong, the antagonist from Metal Gear Rising, and it spread as a sarcastic reply to posts that make bold claims without evidence. Creators pair the audio with screenshots, debate clips and comment threads, turning 'back it up with a source' into a shorthand challenge. Its staying power comes from that simple, reusable setup: it works for politics, gaming arguments, fandom debates and everyday online disagreements without needing the original context.