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Most of us move through life assuming we know things. We know our names, our city, and the faces of people we love. But strip away the assumptions, and a haunting question emerges: What does it actually mean to know something
Knowledge, at its core, is a cognitive contact with reality. Imagine two poles: on one side stands a conscious mind, curious and reaching — on the other, a slice of reality waiting to be grasped. The nature of that connection between the two is precisely what defines the kind of knowledge we possess.
This connection can be direct or indirect. When it is direct, it is called knowledge by acquaintance, or knowing of, because you encounter something through raw, first-hand experience. When it is indirect, it is called propositional knowledge, or knowing that .because you come to know something through reasoning, testimony, or communication.
Consider a simple example. "You know Hassan" is knowledge by acquaintance, why? because you have met him, talked to him, and shaken his hand. That experience is yours alone and cannot be handed to someone else. But "You know that Hassan lives in Pakistan" is propositional knowledge, as this is a fact you learned through a conversation, a message, or a mutual friend. Unlike acquaintance knowledge, this kind of knowledge can be transferred. It can travel from one mind to another across time and distance through communication
This definition, articulated by philosopher Linda Zagzebski, cuts to the heart and tells us how human beings relate to the world around them and why not all knowledge is created equal.