Principle
A principle is a comprehensive and fundamental law, doctrine, or assumption that forms the basis for reasoning, belief systems, or conduct.[1] In philosophy, the concept derives from the Greek archē, denoting an origin or beginning from which entities or arguments proceed, often as self-evident starting points that underpin deduction or explanation.[2] Aristotle treated principles as indemonstrable premises—such as axioms, definitions, and suppositions—that compose the foundational elements of scientific theorems and ethical inquiry, emphasizing their role in bridging empirical observation with rational demonstration.[3]Beyond philosophy, principles manifest in ethics as enduring rules guiding moral action, independent of situational expediency, and in natural sciences as invariant laws describing causal mechanisms, such as conservation principles derived from empirical invariants rather than arbitrary convention.[1] Controversies arise over whether principles are absolute and discoverable through reason and evidence or relativistic constructs shaped by cultural or subjective factors, with empirical traditions prioritizing those verifiable against reality over ideologically imposed norms.[4] In practice, adherence to sound principles enables causal prediction and robust decision-making, as seen in first-order derivations that decompose complex problems into elemental truths, contrasting with analogical reasoning prone to accumulated errors.[5] This foundational utility underscores principles' enduring significance across disciplines, from legal doctrines rooted in objective justice to engineering axioms grounded in material realities.[1]