it's anybody's/anyone's guess

it's anybody's/anyone's guess

It is uncertain or unknown. Why do dogs and cats hate each other? Well, it's anybody's guess. No one has been able to determine why my daughter has been having nightmares—apparently, it's anyone's guess.See also: guess

It's anybody's guess

No one knows, so anyone's guess is as good as anyone else's. A: When will the messenger be here? B: It's anybody's guess.See also: guess