- PowerScore Staff
- Posts: 8223
- Joined: Feb 02, 2011
Flaw in the Reasoning. The correct answer choice is (E)
The conclusion of the argument is given in the last sentence: no species of any is a threatened species. The strong wording of this conclusion should catch your eye, as it is difficult to prove such an absolute statement. The author bases this argument on the fact that ants are the most successful of insects, and insects are a type of species that spread into virtually every ecosystem (as opposed to other species that inhabit small geographical areas and thereby become threatened). This is an error of division: just because ants in general are good at spreading into new ecosystems and avoiding threats in that particular way, does not mean that every single species of ant is free from all threatening elements.
Answer choice (A): The argument is discussing the range from the Arctic Circle to Tierra del Fuego, not those specific locations as isolated places.
Answer choice (B): The argument is not trying to claim that ants are unlike other insects, but rather the author claims that all ants are free from all threats. The problem is that just because this may be true for ants in general does not necessarily mean it is true for every single ant species.
Answer choice (C): Again, the flaw is not that the author misuses/incorrectly assumes something about the word “threat,” but instead that the author makes a sweeping generalization about every type of ant when it may only be true for most ants or for ants in general (there could still be some threatened ant species even if ants in general have the qualities described).
Answer choice (D): This is a reversed answer (an error of composition, rather than division). For this to be correct, the author would have to conclude that because something was true for a single species of ant (or a few species) it must be true for all species of ants.
Answer choice (E): This is the correct answer choice. As mentioned previously, the error is that the author gives information about ants as a whole and then attempts to apply that to every type of ant. This is known as an error of division.