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I realized the difference between B and E are simple, but not initially obvious. I haven't really seen many mentions of it:
Basically, whether B is valid or not is irrelevant. Forget about that aspect for now.
Stimulus says: (some: 1-100%) cluster of minor tremors -> (every) major earthquake
Analogy -> Every time before I bomb a certain country, I lie on TV. I lied on TV today, therefore I will bomb the country soon. (FLAW: past does not predict future)
B says: (All: 100%) high snowfall in region -> (every) river overflow
E says: (some: 1-100%) high infection rate detection -> (every) all local outbreaks among humans
The stimulus says that a cluster of minor tremors does not guarantee major earthquakes. It could, we don't know. Same with E.
Perhaps there's only ever been 1 major earthquake in the region's history, and it was preceded by minor tremors. But there's minor tremors every day that don't lead to major earthquakes. Same could be said about E.
However, B says that there's a 100% guarantee high snowfall leads to river overflow. Why? Because unlike the stimulus & E, B is time-locked by the mention of "spring". If we know that there's only 1 possible instance for river overflows to happen per year, then we don't have to worry about other instances of it happening. High snowfall is effectively sufficient, but one could argue the flaw here is that it's not truly sufficient because it's a past event (that's where the argument over validity comes in- basically irrelevant) predicting a future one.
It's also not a sufficiency-necessity flaw bc we don't actually know if minor tremors are sufficient to major earthquakes. To be honest, I think this problem is junk.
Lol, I thought "answer for their performance" means they'll be dismissed. I know I and many others have been told by our teachers, higher-ups, and parents that we'll have to "answer for our behavior", which often ended up in some kind of penalty. Even our politicians and courtroom judges use it as a threat.
In real life, it is rarely the case that the local economy is separate from the businesses inside of it, especially not new ones. Of course, there are particularly nasty examples that serve as a critique of capitalism & poor city planning.
However, we need to drop our outside assumptions in order to answer this question, or at least be mindful that we hold these assumptions, many of which are true outside of the scope of the exam.
A potential real-world example of this is data centers. Building & running data centers has little to no positive impact for the local community's economy, but the economic activity of said data centers is massive and the corporations running them reap the benefits. The local economy's GDP artificially "increases" by forcing taxpayers to subsidize these data centers, but the increase in negligible and inevitably is smaller than the gains the corporations receive.
@cbrianne1570 i agree. this is why im moving on and gonna do a practice problem using sequential
@jarediw11881 Wow, i just did this PT and only got 21 & 24 wrong. I felt the exact same way.