On Wednesdays, Kate usually buys

Answer choices

1. A

   Correct48% picked this

   Only teachers at the Culinary Institute are allowed to use the institute's main kitchen. Most dinners at Cafe Delice are prepared in that kitchen.

   Why this is right

   We've got a conditional premise: use Culinary Institute's → teacher at main kitchen Culinary Institute We've got a premise that triggers that rule. Since most dinners at Cafe Delice are prepared in Culinary Institute's main kitchen, we know that Culinary Institute's main kitchen got used, so we know that teachers were doing the preparing. Thus, we can accept the conclusion that some dinners at Cafe Delice were prepared by Culinary Institute teachers. This argument mimicked the feature of the original that the conclusion is weaker than it could have been. It would have been fair to conclude that "most dinners at Cafe Delice are prepared by Culinary Institute teachers", but this answer uses at least just as the original argument used sometimes.

   Skill tested: Parallel · how this choice captures the argument's function is the move to repeat next time.

   48%
2. B

   Bad Premise Match Bad Conclusion Match10% picked this

   All dinners at Cafe Delice are prepared in the main kitchen of the Culinary Institute. But only teachers at the institute are allowed to

   A quick glance at the conclusion would show us that it has a mismatching strength. The original conclusion was "sometimes she must shop at store". This conclusion is "all dinners must be prepared by teachers". Both of these premises are conditional (all / only). We wanted one conditional premise and one factual premise that would trigger it (preferably in most format, like the original). These two premises combine to form a conditional chain: dinner prepared in prepared by at → kitchen of → Culinary Institute Cafe Delice Culinary Institute teachers So the conclusion is a valid one; it's just the argument has fewer structural similarities to the original than (A) does, because (A) matched the Most premise and the Sometimes conclusion.

   10%
3. C

   Invalid Logic6% picked this

   Most dinners at Cafe Delice are prepared in the main kitchen of the Culinary Institute. All the teachers at the institute are allowed to

   There is a conditional premise, you teach at Culinary Institute → can use Culinary Institute's kitchen But nothing triggers that rule. The premise tells us about using Culinary Institute's kitchen, so it would be a flaw to read backwards and think that it tells us anything about teachers. In other words, just because all Culinary Institute teachers are allowed to use the main kitchen, that doesn't mean that if we know the main kitchen was used that we know it was a teacher who did the preparing.

   6%
4. D

   Invalid Logic17% picked this

   Most teachers at the Culinary Institute are allowed to use the institute's main kitchen. Dinners at Cafe Delice are only prepared in that kitchen.

   There is a conditional premise, dinner at Cafe Delice → prepared using Culinary Institute's kitchen But nothing triggers that rule. The premise tells us about using Culinary Institute's kitchen, so it would be a flaw to read backwards and think that it tells us anything about dinner at Cafe Delice. In other words, just because most Culinary Institute teachers are allowed to use the main kitchen, that doesn't mean that any of the Cafe Delice dinners that were prepared in that kitchen were prepared by Culinary Institute teachers.

   17%
5. E

   Invalid Logic18% picked this

   Only teachers at the Culinary Institute are allowed to use the main kitchen of the institute. Dinners at Cafe Delice are usually prepared by

   There is a conditional premise, allowed to use main kitchen → teach at Culinary Institute But nothing triggers that rule. The factual premise tells us about Culinary Institute teachers, so it would be a flaw to read backwards and think that it tells us anything about main kitchen. In other words, just because most Cafe Delice dinners are prepared by Culinary Institute teachers, that doesn't mean that the Culinary Institute teachers used the main kitchen of Culinary Institute to cook the meal. We're told that "only Culinary Institute teachers can use the main kitchen", but this argument is assuming "the main kitchen is the only one that Culinary Institute teachers ever use". It's possible that Culinary Institute teachers prepare most dinners at Cafe Delice in the Cafe's own kitchen. Nothing in the evidence rules out that possibility.

   18%