gwd26-7-9

105ss

其实看看大家的分析还是蛮有用的，至于题目本身我觉得没必要过于纠结，真实考试出现这种争议性较大的题目概率不大

Narcisuss_d

既然有同学说官方prep答案是C，那我们就不要再争议了。
我给出RON的解释：
by the way—the best way to get to the point quickly is to imagine a conversation in which someone is presenting the same information. (it helps to be a nerd, since nerds tend to talk about random stuff like what's in the passages.)

here's the first sentence:
"There is no consensus among researchers regarding what qualifies a substance as a pheromone."

in other words... People don't agree on what 'pheromone' means.

if someone said this, what would come next?
you know what would come next—there would be at least some discussion about the different ways in which people try to define this word.

RON的解题原网站：https://www.manhattanprep.com/gmat/forums/rc-there-is-no-consensus-among-researchers-regarding-what-t31410.html

LeahOhLeah

There is no consensus among researchers regarding what qualifies a substance as a pheromone.
对于啥是pheromone，不一致。

主要定义：
While most agree on a basic definition of pheromones as chemicals released by one individual of a species which, when detected by another individual of the same species, elicit a specific behavioral or physiological response,
简单化学定义
some researchers also specify that the response to pheromones must be unconscious.
补充定义，个体对pheromone的反应一定要是无意识的。

除此之外的时候开始慢慢转折：
In addition, the distinction between pheromones and odorants—chemicals that are consciously detected as odors—can be blurry,
定义里把p跟odorant对比，说区别含糊不清。注意，p是无意识的，o是有意识的。
and some researchers classify pheromones as a type of odorant. 这里的and却转折了。说起有人认为p就是一种o。

保护主要定义：
Evidence that pheromone responses may not involve conscious odor perception comes from the finding that in many species, pheromones are processed by the vomeronasal (or accessory olfactory) system, which uses a special structure in the nose, the vomeronasal organ (VNO), to receive chemical signals. The neural connections between the VNO and the brain are separate from those of the main olfactory system, whose processing of odorants triggers sensations of smell.
这里就反驳前一句，说明p是无意识的。后面可以扫着看，因为没转折意思。

Weaken自己:
But while the VNO does process many animal pheromone signals, not all animal pheromones work through the VNO. Conversely, not all chemical signals transmitted via the VNO qualify as pheromones. For example, garter snakes detect a chemical signal from earthworms—one of their favorite foods—via the VNO, and they use this signal to track their prey.
再weaken自己的论点，毕竟什么都不可能十全十美无一例外，讲清楚他例。之前写论文老师也说自己要找削弱的点，找一些没那么重要的点做削弱。