I Can Have True Belief, but Yet Lacks Knowledge

Planning is a philosophy of mind that aims to explain how the mind can be used for good. Theories include Descartes' "principle of proper function," which says belief in other minds should be justified by certain conditions. If faculties are functioning properly, and environment they're designed for, then there's a high probability their beliefs will be true,. And so you have warranted true belief, which is the definition of knowledge as it plan to get advances.