The error is incorrect word order after 'little.' When 'little' (meaning 'not much') begins a sentence for emphasis, it requires subject-auxiliary inversion. Instead of 'Little we know,' it should be 'Little do we know.' This construction places the auxiliary verb 'do' before the subject 'we,' similar to how 'Rarely do we see' is correct instead of 'Rarely we see.' This formal structure adds emphasis to the statement.