A priori knowledge is knowledge before looking out into the world. Option d is correct.
A priori knowledge refers to knowledge that is independent of experience or observation. It is knowledge that is obtained or justified through reasoning, deduction, or logic rather than through empirical evidence. A priori knowledge is often considered to be innate or existing prior to any sensory experience.
Examples of a priori knowledge include mathematical truths (such as "2 + 2 = 4"), logical principles (such as the law of non-contradiction), and certain philosophical truths (such as "all bachelors are unmarried"). These statements can be known to be true or false without relying on any specific observations or empirical data.
In contrast, a posteriori knowledge refers to knowledge that is obtained through experience, observation, or empirical evidence. This type of knowledge relies on sensory perception and the collection of information from the external world.
Therefore, d is correct.
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