PT150 S3 Q8 ExplanationOf the many works in a collection

Answer choices, explained

1. A

   Bad Premise/Conclusion Match4% picked this

   The city council will soon commission surveyors to update the city map. The new map will reflect existing structures as well as planned housing

   This gives us a conditional that could match up with our "A or B → C". If existing structure → on the map or planned development So, looking at our recipe, what would the next ingredient need to sound like? Premise 1: A or B → C Premise 2: Thing X is C. Conclusion: Thing X is B. We'd need to hear, "Thing X is on the map". And then the conclusion would arbitrarily pick one or the other trigger idea. "Thus, Thing X is an existing structure", or "Thus, Thing X is a planned development".

   4%
2. B

   Bad Premise Match8% picked this

   The city map was recently updated. Purple dots now indicate public buildings, whereas on the old map, blue dots indicated public buildings. On the

   This fails to give us any conditional that could match up with our "A or B → C". We basically get two separate conditionals. If new map and purple dot → public building If old map and blue dot → public building So, looking at our recipe, what would the next ingredient need to sound like? Prem 1: A or B → C Prem 2: Thing X is C. Conc: Thing X is B. We'd need to hear, "Thing X is a public building", in order for the author to perform an illegal reversal. Instead, the premise is talking about a "blue dot on the new map", which isn't a trigger or outcome we even have.

   8%
3. C

   Bad Premise Match2% picked this

   I have just purchased the new city map, whose legend indicates that thoroughfares are marked by solid lines and that dotted lines designate one-way

   This fails to give us any conditional that could match up with our "A or B → C". We basically get two separate conditionals. If thoroughfare → solid line If dotted line → one-way street Those don't have the same outcome, so we can't match up with the original: if most sensitive to light → 2 weeks only if most valuable → 2 weeks only

   2%
4. D

   Bad Premise Match1% picked this

   On this city map, a solid line designates the city limits. Solid lines also designate major thoroughfares. So there is no way of determining

   This fails to give us any conditional that could match up with our "A or B → C". We basically get a simple trigger with a compound outcome. If solid line → city limits or major thoroughfare This argument also doesn't have enough premises. It goes straight from these conditionals into the conclusion.

   1%
5. E

   Correct85% picked this

   The legend on this city map indicates that historical monuments are designated by purple dots. Hospitals are also designated by purple dots. There is

   Why this is right

   We can match this up with the original argument. Premise 1: A or B → C Historical monument → purple dot or hospital Premise 2: Thing X is C. This thing on Wilson Street is purple dot. Conclusion: Thing X is B. This thing on Wilson Street is a hospital. This replicates both the illegal reversal and the arbitrary choice between two options.

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

   85%