 One of the main motivations for the Transmission View comes from an alleged analogy between testimony and memory: Just as I cannot acquire memorial knowledge that p today if I did not know that p at some earlier point in time, I cannot acquire testimonial knowledge that p from you today if you do not know that p yourself. (But see Barnett 2015 for a recent discussion of the important differences between memory and testimony, and see Lackey 2005b for why memory can generate knowledge.)