Beauchamp and Childress, and Engelhart agree in establishing principles in bioethics, however, the formers seek after the material principles and the latter after the formal principle.

• 比彻姆和丘卓斯及恩格尔哈特都赞同建构原则，只不过前者主张建构实质性原则，后者主张建构形式性原则。