Underlying principle

Hello @zgnewquist, An underlying principle is not the same thing as an unstated assumption. Answer choice E is incorrect, but I'll try to explain how to identify principles because you will see them on other questions. A principle will be a general statement or rule that can be applied to more specific scenarios. You will encounter many of them in regard to morality. For example: If one believes that a course of action is morally right, then one has a duty to pursue that course of action. Example: One should not lie to one's friends, unless doing so will protect a friend from harm. Do you see why there is no underlying principle in this question? That people consume enough salt to provide significant amounts of iron is simply a piece of information given in support of the conclusion. Does that answer your question?

Thank you, that is helpful!

Will a principle always be stated in conditional terms?