👉 Non-severities are a concept in physics, particularly in the field of quantum mechanics, that refers to the state or properties of a system when it is not observable. Non-severality is often used as a measure of the degree to which a system may be described by wave-like or particle-like properties. In simpler terms, a non-severality statement indicates that a physical system is not directly detectable from other systems in the same universe, such as through visible light or electromagnetic radiation.