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- In mathematics, a number is called positive if it is bigger than zero. See negative and non-negative numbers.
- In physics, one distinguishes positive and negative electric charges.
- If a medical test for a certain disease is applied, the outcome is termed positive if the disease is detected.
- In the humanities and social sciences, a theory is called positive if it aims to describe what is the case as opposed to what ought to be the case. See positive (social sciences).
- In philosophy, positivism is the name for theories which aim to be based on facts alone, eschewing metaphysics and religion.