I know why the credited response (E) is correct.
However i'm having a tough time seeing how (B) and (C) are incorrect.
I initially picked (B)
My reasoning was that the opponent raises an important point: That irradiation fails to neutralize the bacteria that cause botulism and in fact aids it by concealing its warning signs. This seems to contradict the proponent's conclusion that there is no reason to reject irradiation as far as health and nutrition is concerned.
For (C) there appears to be two remedies for keeping food from being spoiled by bacteria the first is: irradiation brought up by the proponent and the second is chemical dip method brought up by the opponent. the opponent seems to bring up a consequence of the first remedy (failing to kill bacteria that cause botulism which can lead to serious food poising).
If someone could help me out with this that you be awesome, thanks!
https://7sage.com/lsat_explanations/lsat-35-section-1-question-05/
Comments
In life, we may think that failing to consider alternative explanations is contradicting our own arguments but I find that on the LSAT "self-contradiction" is a very narrow phrase and is rarely often the right answer. This is purely anecdotal so don't quote me on that but that's the trend I've seen.
(C) is incorrect for a couple of reasons:
- "Either one of two proposed remedies": the first speaker only raises one remedy - irradiation to prevent food poisoning. The second remedy is raised by the opponent.
- "undesirable consequences": even if you were to assume that there are two remedies being discussed, the opponent doesn't think both remedies have undesirable consequences. In fact, he/she would argue that the chemical dip is a desirable consequence because it doesn't kill whatever causes the smell associated with botulism.
I think your second explanation for why C is wrong is more convincing requires the assumption the phrase "either one of" is inclusive, i.e., both, any of the two remedies. I interpreted "either one of" as being exclusive i.e., on or the other but not both. I think your interpretation of "either one of" as being inclusive is correct and that I misinterpreted it.
For B, I agree with you insofar as the undermining of an argument doesn't not necessarily result in the self contradiction of the claims that compose said argument. That said, in this particular instance it appears that by raising the claim irradiation does not prevent botulism, the opponent is demonstrating that the proponent's conclusion: there is no reason to reject irradiation on the grounds of health or safety is self-contradictory. The proponent would not need to contradict himself/herself initially in order for this choice to be correct. The opponent could raise a claim that would show the self-contradictory nature of the proponent's argument no?
Proponent's argument:
Premise 1 : Irradation of good by gamma reyes prevents food from spoiling before it reaches store.
Premise 2: Irradation leaves no radiation behind and vitamin loss is comparable to those that occur during cooking
Premise 3: It kills salmonella bacteria which can cause serious illness.
Conclusion: There is not reason to reject irradation on the basis of health or safety.
Opponent: Irradation doesn't kill the bacteria that leads to botulism a very serious form of food poisoning. In fact irradation conceals botulism by killing the bacteria that emit strong doors to warn consumers of botulism.
This retort seemingly contradicts, the proponents main point that there is no reason to reject irradation on the basis of health and or safety.
(B) I think you're right that self-contradiction doesn't mean the proponent has to make a self-contradictory argument but I think the principle of "Just because the speaker brings bad or incomplete evidence is not the same as the logical fallacy of self-contradiction" still holds here.
However, I think B is wrong on the account that although one of the opponent's claims completely contradicts proponent's conclusion, it does not show that said conclusion in complete contradiction with the premises he/she that are used to substantiate it.
To disprove means to prove something is false.
I'm BRing pt 35 right now and that's why I crossed out b.
c. This one says that the undesirable consequences result in the adoption of either one or two remedies. But no, the opponent totally says that irradiation doesn’t work on botulism and that they should use the other method, plain and simple. The opponent is not doing what this ac is saying.
A self-contradictory argument is inconsistent on its own -- it's logically impossible for all of the propositions in the argument to be true at the same time. But this isn't the case for the proponent's argument. We can easily conceive of how all of the propositions in the argument COULD be true at the same time (regardless of whether they are actually true). Moreover, the opponent isn't showing that there's an internal inconsistency with the proponent's argument, but is rather bringing in additional facts that call into question the proponent's claims.