If a river is constantly moving and sense experience is veridical, then everything is in flux. If sense experience is veridical, but not our only means of knowledge, then not everything is in flux. So, if a river is constantly moving and sense experience is veridical, then the senses are our only means of knowledge.
-Working backward from the conclusion of this argument, which of the following is the most likely justification of the last step of the derivation?
A) Impl
B) Equiv
C) Taut
D) Exp
E) HS

Question

Quizplus · Accepted Answer

The last step of the argument concludes that the senses are our only means of knowledge. This is a specific claim about the nature of knowledge, so it requires an explanation or expansion (Exp) of the reasoning behind it. The argument does not involve any logical equivalences (Equiv), tautologies (Taut), or hypothetical syllogisms (HS). While it may involve implicit premises (Impl), the best way to justify the conclusion is to provide an explanation for why the senses are the only means of knowledge, which is what option D offers.

If a River Is Constantly Moving and Sense Experience Is