text:  Still it must be remembered that even among the more common of ordinary cases in which the forms are simple the practice certain and in which the law may be supposed to be already defined beyond the possibility of doubt error or misconception--even in such cases questions occasionally arise which scarcely admit of any satisfactory solution--questions in which the fifteen judges to whom they may be referred often find it impossible to agree and which may therefore be reasonably supposed to be sufficiently perplexing to the rest of the world