Uncertainty refers to situations involving imperfect or unknown information, creating a state of doubt or hesitancy. It applies to predictions of future events, measurements, and the unknown, playing a crucial role in decision-making across various fields like insurance, philosophy, physics, economics, and more. Uncertainty arises in partially observable, stochastic, complex, or dynamic environments, often due to ignorance.
Frank Knight, an economist, distinguished between risk and uncertainty, defining uncertainty as the lack of quantifiable knowledge, making it immeasurable and impossible to calculate probabilities. Knight argued that uncertainty is uninsurable, unlike risk. In science, uncertainty is inherent due to the complexity of natural phenomena and human limitations. The uncertainty principle in quantum mechanics, introduced by Werner Heisenberg, states that there's a limit to the precision with which certain pairs of physical properties, like position and momentum, can be known simultaneously.
