The principle of nonmaleficence recognizes that in any action or intervention, there is a potential for harm. It emphasizes the importance of weighing the risks and benefits of any course of action and taking precautions to avoid causing unnecessary harm. Healthcare professionals are expected to make reasonable efforts to prevent harm to their patients and to prioritize their safety and well-being.

Kant's formulation of the Categorical Imperative revolves around the idea of acting in a way that treats individuals as ends in themselves and not merely as means to an end. In other words, it emphasizes the inherent dignity and worth of every human being and demands that we act in a way that respects and upholds their autonomy and moral agency. 

In rule theory, moral rules or principles are seen as providing guidance and establishing moral norms that should be followed in a consistent and impartial manner. These rules are typically derived from ethical theories, religious teachings, cultural norms, or legal frameworks.

The four commonly recognized principles in principlism are:

Principlism encourages healthcare professionals, ethicists, and individuals involved in healthcare decision-making to consider and balance these four principles when facing ethical dilemmas. It provides a framework for evaluating and resolving moral conflicts by weighing the values and principles at stake and seeking a reasonable and ethically justifiable resolution.