Sufficient Assumption Questions

harrismegan

I have two that I need an explanation to.... if anyone wants to take a crack at them.
PT 9, S2, Question 23.
PT 15, S3, Question 18.

Please & thank you!

harrismegan

I think I understand the reasoning now.

The first one....
R -- /P
/R -- P

H -- /D
/H -- D

Conclusion: R ---- D

R -- /P

/H --- D
---------------------------
R - D
The missing premise would be /P --- /H
Or, if you are an honest farmer, then you are poor, which is A.

harrismegan

For the second one,

Conclusion: All genetic mutation is random.
Why? Because the bacteria grew at random.

However, C is wrong because it does not say that ALL the bacteria grew at random.
A provides the link - either all genetic mutations are random, or none are random.