The phrase plays on Sherlock Holmes, the famously observant fictional detective, and has long been used in English as a sarcastic reply to someone stating the obvious. Online, it became a go-to reaction line for memes, commentary videos and short-form edits, where a single deadpan delivery can puncture a needlessly serious moment. Its staying power comes from its versatility: it works for sports blunders, gaming fails, everyday conversations and scripted comedy alike, because stating the obvious never stops being funny.