It looks like you're new here. If you want to get involved, click one of these buttons!
I didn't think there was a good answer...
Why is D correct? and what kind of flaw is this?
"Faden presumes, without providing justification, that the evidence for a claim has not been undermined unless that evidence has been proven false"
but I thought we are not allow to go after the truth of premise?
Admin Note: Edited title. Please use the format"PT#.S#.Q# - brief description of question"
Comments
I thought this was a really tricky question for a 3-level difficulty.
F: Our exercise machines are in use after 1 yr [CONCLUSION], because our survey of customers says so [PREMISE].
G: But those customers in the survey could have been lying.
F: You can't prove they were lying, so your objection is wrong.
F's flaw is that they assume their premise/evidence remains true simply because G isn't able to definitively prove that it is false. Simply arguing that an objection to your premise is false does not make that premise true.
I think what makes this question hard is the fact that F does not state this assumption directly. If in the last paragraph they said, "therefore, my survey is still true!!" D would jump out a lot more.