by bbirdwell Wed Apr 06, 2011 2:17 am
Let's start with the core of the argument.
Premises:
1. Action --> consequences --> other actions
2. know an action is good --> know whether consequences are good
3. Cannot know the future.
Conclusion:
1. there are no good actions
Next, evaluate the logic and spot any potential gaps before going to the choices. I see a couple. One is the concept of future -- it's not explicitly connected to consequences, therefore the author must be assuming that knowing consequences means knowing the future.
The second gap I spot is a vintage LSAT language shift. Notice how the evidence is all based on knowing -- knowing whether an action is good, and knowing whether the consequences are good.
Then, all of a sudden, the conclusion switches to being -- there can be no good actions.
So, according to this argument, there can BE no good actions because we can't KNOW whether actions are good.
That's not good logic. Just because i don't KNOW something doesn't mean that that something doesn't exist. Do you see that distinction?
With that in mind, while the correct answer might hinge upon the "future" concept, it's more likely that the right answer will somehow connect knowing good with being good, as that's what this argument requires in order to function.
(A) Eliminate. This is not required by the argument at all.
(B) Eliminate. Out of scope.
(C) Eliminate. Out of scope ("refraining...")
(D) Eliminate. Doesn't matter. In fact, this is contradicted by the argument, which says that actions are AMONG the consequences of actions, which suggests that there are consequences that are not actions.
(E) Correct! Double check it by negating it. If an action can be good without us KNOWING that it's good, then the whole argument falls apart.
See that?