I read through the previous posts and this question is still bugging me. I can see why every answer other than D is incorrect. But as a couple people mentioned earlier, D itself seems like it's incorrect too. Greg’s argument was: P1: Handwriting analysis is currently problematic/ not a legitimate co...

It's because the premise was stating a fact and not making a claim that it's not an intermediate conclusion, right? So, if the premise had been, "Because insects' resistance to insecticides increases with insecticide use, farmers will have to use greater and greater amounts of costly insecticid...