- Fri Aug 05, 2016 5:08 pm
I'll add my two cents here on what's wrong with answer C, and it's the difference between "that's all we found" and "we found all of that everywhere."
Let's forget about phytoliths and ancient apes - let's make this more personal. Let's talk about college freshmen. First time away from home, mom not there to cook them a good dinner, the cafeteria isn't cool, so what do they do? They live on mostly pizza and ramen noodles and snickers and monster. Mostly, but not exclusively.
Now, you're a scientist, and you uncover the remains of some college freshmen, and you study their teeth to find out what they ate. You find pizza, and snickers, and ramen, and monster, and nothing else, so you conclude that that's all they ever ate. What's wrong with this conclusion? It ignores the possibility that they brushed their teeth and removed all traces of something - maybe they had mac and cheese at the cafeteria the day before they died, or maybe they went home and had some green beans and baked chicken with Mom and Dad the prior weekend. I suppose it's possible they drank some beer, but probably not, since they were freshman and underage and of course they would not do that. But maybe. Maybe they ate something, maybe some apples, that miraculously left no trace in their teeth - it all went down the hatch without leaving any evidence that it was ever there.
So there is the problem - just because all we found was the junk food doesn't prove that all they ate was the junk food.
So what about C? Does it matter that they found pizza on some teeth, and snickers on other teeth, and ramen on some other teeth, but not every tooth had each thing on it? Pizza on the molar, snickers on the bicuspid, monster on the tonsils, etc. - is that a problem? Not at all - they never said that the food they ate left exactly the same stuff on each and every tooth. It's about the cumulative findings - we found a total of four foods on the teeth, not necessarily four things on each tooth.
Chew on that explanation a while and see if you can digest it!
Now I feel like I need to brush my teeth. Or eat a snickers. See ya!
Adam M. Tyson
PowerScore LSAT, GRE, ACT and SAT Instructor
Follow me on Twitter at https://twitter.com/LSATadam