 Following Stanley’s (2011b: 126) modal restriction proposal (cf.  section 3),  Cath (2017, 2019) responds that depending on how the context for the modal is restricted, (i) could mean either that Mark knows how John could swim given his current physical state or how John could swim after training. If only the latter, that is not the sort of proposition that John needs to know in order for (iii) to be true: for that, John ought to know that that is how he could swim under his current physical state. (Though see  section 2  for qualms about this intellectualist strategy.) Another avenue for reply to the challenge from testimony may be to insist that not every propositional knowledge is transferable through testimony. A comparison: visual knowledge that Mark murdered Tina differs in content and mode of presentation from the knowledge that of the murder obtained by being told by his prosecutor. The former observational knowledge is not transferable through mere testimony but (exactly because of that!) it is more helpful for the purpose of convicting Mark than second-hand knowledge. That does not mean that observational knowledge is not propositional. Like in the case of perceptual knowledge, the proposition that one knows by knowing how to do something involves distinct modes of presentation of ways of doing things  (section 2,  section 3). We should not expect propositions under this mode of presentation to be transferable through testimony. (For a response to Poston 2016, see also Peet 2019).