Journey180 wrote:Hey Mike,
Question: In the Manhattan book, it has an example that reads, " Sally owns more cookbooks than Finn. Therefore, Sally is a better cook than Finn." Then, the Manhattan book explains that " Fin is a cooking school instructor and the books Sally owns were written by Finn" is a possible answer to a weaken question regarding the said argument. Manhattan also says this is, however, not a necessary assumption. My question, and it would really help to get an answer on it because there are other implications in my studies, is: would the negation and thus rendering of the weakener to "Fin is not a cooking school instructor or did not write the books Sally owns" then turn it into a necessary assumption? I'm asking because I'm thinking of possible applications of the negation test...perhaps in reverse-negations? Like find something that hurts the argument then negate it and that automatically becomes a necessary assumption.
Hi there --
I had a little bit of difficulty understanding your question, so please let me know if you are asking about something else (and if so, sorry for wasting your time) --
Also, I think that in general MLSAT, which has their own people on these boards, would prefer to get q's that are specifically about MLSAT materials sent their way -- however, I did write that portion of the book (while staring at a row of cookbooks on my living room wall), so I'm more than happy to give my thoughts --
I think what you are asking is whether you can use the negation test on the negations of strengthen answers, or on weaken answers created by negating the strengthen answer, in order to test out the answer choices -- in either case, the answer is no (wow is that a complicated sentence! but that's your fault, not mine ). Strengthen and weaken answers are not answers that necessarily have to be true in order for the argument to work, and so I think the negation test, no matter how you rearrange the elements, does you very little good.
HTH -- please reach out if it doesn't or if you need anything else -- Mike