 Given these considerations, perhaps “experience” should be taken to mean “sense experience of any sort, introspection, proprioception, memory, and testimony”. This sounds like a hodgepodge of various sources of justification but perhaps what unites them is that, leaving aside memory and testimony, these sources provide us with information either about the physical world or our inner world, either the outer world through perception or the inner world of what we are feeling or thinking, or information about our bodies, through introspection and proprioception. Memory and testimony are not primary sources of justification; their primary epistemic function is to transmit either a priori or empirical justification. So the proposal should be seen as a way of distinguishing the primary sources of justification into two categories of justification: a priori and empirical.