It's anyone's guess

Origin

Picture a moment when a question hangs heavy in the air, its answer shrouded in mystery, defying even the wisest minds. The word 'guess' itself, with roots in Old Norse 'giska,' has long captured the human act of making a judgment without full knowledge. But when that uncertainty becomes universal, when every individual's attempt to predict the future is equally baseless, the phrase 'it's anyone's guess' truly shines. Emerging in the late 19th or early 20th century, this idiom became the perfect linguistic shrug, a collective admission that some questions simply have no definitive answer, leaving us all adrift in a sea of speculation, where one person's hunch is just as valid—or invalid—as the next.