There are circumstances

Answer choices

1. A

   Bad Conclusion Match8% picked this

   There are many business events for which casual dress is appropriate, and there are many social events for which casual dress is appropriate; therefore,

   The conclusion would have to say, "Thus there are many events that are both business and social for which casual dress is appropriate".

   8%
2. B

   Bad Premise Match1% picked this

   It is usually easy to move a piano after you have convinced five people to help you, provided that you do not need to

   This only uses the common trait twice (once in evidence, once in conclusion). We need a 2nd premise about "usually easy" and then a conclusion that combines moving a piano + that 2nd thing and says that the combined action would also be "usually easy".

   1%
3. C

   Correct85% picked this

   It is healthful to take drug A for a headache, and it is healthful to take drug B for a headache; therefore, it is

   Why this is right

   This says A alone is healthful, B alone is healthful, and then makes the dubious conclusion that "A and B" together would be healthful.

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

   85%
4. D

   Bad Premise Match3% picked this

   Heavy trucks are generally operated in a safe manner, but the ability to drive a truck safely can be impaired by certain prescription drugs.

   Premise 1: Action A is usually safe. Premise 2: Action A (combined with B) is sometimes unsafe. Stop reading there. There's no way for this to match up.

   3%
5. E

   Bad Conclusion/Premise Match3% picked this

   The mountain roads are treacherous after it rains, and the mountain streams are full after a rain. So, if the roads in the mountains

   The 2nd premise needs to still use the trait of "treacherous", but it doesn't. And the conclusion is a conditional claim, which the original wasn't.

   3%