Final answer:
Propositional knowledge, under the tripartite view, is defined as justified true belief, involving a true proposition which the person believes and for which they have justification.
Step-by-step explanation:
The tripartite view, often associated with Plato's traditional account of knowledge, defines propositional knowledge as justified true belief. According to this view, a person S knows a proposition P if and only if P is true, S believes P, and S has justification for believing P. Propositional knowledge is concerned with statements about the world that can be determined to be either true or false, and such statements are often described as 'knowledge that.' It should be noted that propositional knowledge can be either a priori, which is knowledge gained through reason alone, or a posteriori, which is knowledge obtained through experience. Critics of this view, like Gettier, have shown that this definition may not be sufficient, as there can be justified true beliefs that still don't constitute knowledge. In response to such criticism, additional conditions have been suggested to amend the tripartite view.