Sufficient Assumption - Please Help

FTGaines

Hi All, I'm racking my brain right now with these SA questions, and I would greatly appreciate the community's help. While I can sort of diagram out the right answer, I don't exactly get why certain elements don't work.

For example:

If the support states that:

Don't Sleep -> Tired -> Prone to Mistakes

and the Conclusion is:

Don't sleep -> Fired

Why is the Sufficient Assumption: "Prone to Mistakes -> Fired" and not "Tired -> Fired"?

ProfileName

from my understanding, if I simplyfie your stimulus into lawgic:

A-->B-->C
?
..................
A--->D

We're looking for the inference that can link C to D, so we can link all elements up to: A-->B-->C-->D. If getting this, all inference are included (A-->C, A-->D, B-->C, B-->D).

However, what you're suggesting would be:

A-->B-->C
B-->D
..................
A-->D

Of course you can get a A-->D, but you're also getting a B to C and D. C and D under this scenario is not related, whereas in the A-->B-->C-->D world, C-->D.

Hope this helps.

FTGaines

Wow, thanks @ProfileName for painting that picture. It's much clearer to me now!