 At this point that the skeptic counters with external world skepticism: “How do you know this world exists…if the senses are fallible?” In other words, the skeptic argues, these disjunctive statements about the external, physical world all assume the existence of an external world, and thus they cannot be known to be true if the external world itself cannot be known to exist. If external world skepticism can be maintained, it follows that Augustine’s disjunctions can be mistaken for what is false, and thus this particular argument against global skepticism will fail.