PT154 S1 Q17 ExplanationBeads were used as currency

Answer choices, explained

1. A

   Backwards3% picked this

   The similarity between the secondary uses of two different objects can cause the primary use of one to

   The primary use of beads and other things that became currency is decoration. The secondary use would be currency. So a better answer would say "the similarity between the primary uses of two different objects can cause the secondary use to be transferred to the other".

   3%
2. B

   Too Weak14% picked this

   The similarity between the primary uses of two different objects can cause the secondary use of one to

   This is better than (A), but the author isn't really talking about the secondary use being transferred over. She's just saying "if it happened before, it's only natural it will happen again". The wording can cause is very weak, and if we're trying to prove a conclusion that's saying "the secondary uses are the same", we'd like to see a stronger punch there: "if two objects have a similar primary use, then it's only natural that they would share a secondary use."

   14%
3. C

   Correct71% picked this

   An object having a certain original use is likely to have the same derivative use as do other

   Why this is right

   Beads are an object that have the same original use (adornment / decoration) as do other objects, such as gold, silver, and feathers. According to this rule, since the derivative (secondary) use of these objects was as currency, it is likely that beads would also come to be used as currency. If it was likely, then that helps support the wording it is natural that beads became currency.

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

   71%
4. D

   Out of Scope: ceases original use1% picked this

   An object cannot take on a derivative use unless it ceases to have

   This rules says doesn't stop being ? can't get used in used in original capacity new way The contrapositive is used in a new way ? no longer used old way That doesn't reflect a move the author made or match up well with the conversation. The author was saying that these other objects were originally used solely as decorative. So when they started to be used as currency, it can just be an additional use.

   1%
5. E

   Unrelated to Goal11% picked this

   The more an object is used to represent value in general, the more likely it is to be

   This does not help us make a move from "if these things went from decoration to currency, it's no shock that beads went from decoration to currency". The sliding scale nature of this principle "the more it's used to represent value, the more it's valued for certain uses" makes it hard to match up. A better answer would be something like "the more something is valued as decoration, the more likely it is to be used to represent value in general".

   11%