Whether or not you believe it, most of us think, speak, and live according to a number of unstated assumptions. You can call them beliefs or ideologies, but in essence, these are ideas that we have come to assume to be true over the years. Similarly, passages on the SAT reading also reveal the assumptions of their speakers. Some questions on the SAT Reading will ask you to identify these assumptions, which may seem like a difficult task.
Technically, an assumption question is a type of inference question. Assumptions, like inferences, are not stated directly in the passage. They have to be inferred from the written material. For this reason, you’ll want to approach assumption questions like inference questions.
What does an assumption question look like?
For the most part, assumption questions will use the word ‘assumption’ or ‘assume’ in the question. You should especially be prepared for assumption questions on two-passage sections, since the SAT writers would like you to identify a shared assumption between contrasting passages or, conversely, a differing assumption between passages that agree.
Let’s look at an example of an assumption question in a two-passage section. The passages are below:
Stem cell research continues to be thoroughly debated in medicine and politics today. There is dissent over whether the method of obtaining stem cells violates medical ethics. Below are two passages, each supporting one side of the issue.
Passage 1
Stem cells truly are science’s miracle cure. These
undifferentiated cells have not yet chosen what type of cell to
become, and can be nudged into becoming whatever type of
cell is needed to help a sick patient. Stem cells can be used to
(5) replace damaged cells in a person who has a degenerative
disease or a serious injury.
Scientists obtain stem cells primarily from discarded
embryos. True, they can also be obtained from the blood or
organs from healthy adults, but these stem cells, while
(10) showing some usefulness, are not as adaptable as embryonic
stem cells. Embryonic stem cells are incredibly helpful and
can mean a revolutionary change in quality of life for patients
suffering from debilitating diseases such as Parkinson’s or
Alzheimer’s. Someday, stem cells could even eliminate the
(15) need for human test subjects in drug tests. Without the use of
embryonic stem cells, though, that could take an
immeasurably longer amount of time to become a reality.
With stem cell research, the benefits for living, breathing,
sentient people outweigh any debate regarding the origins of
(20) the cells themselves. In this age of scientific enlightenment,
we must always ask ourselves: what action can best benefit
humanity? By answering, it is clear that stem cell research
must continue.
Passage 2
We stand at an important crossroads in scientific
(25) progress. We have the capability now to improve humanity in
ways never thought possible, but at what cost? At what point
must progress bow before conscience? Just because we can,
is it true that we should?
Stem cell research has the potential to be an enormous
(30) boon to the medical industry. The advance of diseases can be
assuaged or halted completely through this remarkable new
medicine. But scientists assault the dignity of life when they
use embryonic stem cells for their work. By taking cells from
discarded embryos, we begin treading on a slippery slope. It
(35) is all too easy to transition from using discarded embryos to
creating embryos solely for the purpose of stem cell
medicine.
Since stem cells can be obtained from healthy adults with
no cost to life, this is the path on which we should be
(40) progressing. These stem cells, safely obtained, can have a
significant positive impact on the lives of patients. We must
maintain our respect for life in every form, or else there is no
purpose in continuing to practice medicine.
Example 1: Both authors base the arguments in their passages on the unstated assumption that:
A. Embryos have a right to life
B. Scientific progress is essential to human progress
C. Stem cells can help patients suffering from some debilitating diseases
D. Doctors have an ethical responsibility to heal patients by whatever means are available
E. Embryonic stem cells are far superior to other stem cells
Our first step is to ask how much reading this question expects of us. Because the question wants us to identify a shared assumption between each passage as a whole, we should have read each passage completely before answering. Notice, though, that this question does not require a detailed reading, just a very basic understanding that can be grasped through skimming.
Next, let’s summarize the basic topic and each passage’s argument. The main idea of passage 1 is that stem cell research is science’s ‘miracle cure.’ The first two paragraphs summarize the successful medical research using stem cells, and the third paragraph, while acknowledging the moral controversy surrounding this research, ultimately reasons that stem cells’ benefit to humanity outweighs any ethical concerns about their origin.
Passage 2, on the other hand, identifies the ethical issue as the crux of its argument. This speaker argues that we should only derive stem cells from ‘healthy adults’ and avoid embryonic stem cell extraction because of its moral controversy. His main ethical argument is in opposition to that of passage 1: we should never put “progress” before “conscience.” Notice, though, that this passage acknowledges the benefits of the research itself, saying that “stem cell research has the potential to be an enormous boon to the medical industry,’ and it can even ‘halt’ the “advance of some diseases.”
Now, we can answer the question. I advise you to look at the answer choices before predicting one in this case; after all, we can probably think of many assumptions that both authors share. It’s best to use elimination for this type of problem. Below are the reasons why each wrong answer is incorrect:
A. Passage 1 does not assume this.
B. Passage 2 would respond defensively to this; for that passage, ethics trumps scientific progress.
D. This summarizes passage 1’s argument only; passage 2 would invoke the ethical concerns of the research.
E. Passage 2 seems to assume that stem cells obtained from healthy adults are adequate substitutes for embryonic stem cells.
Our correct answer, then, is C. While is it instantly clear that passage 1 assumes this, we have to examine lines 29-32 in passage 2 to see how that speaker acknowledges this assumption. Even if the main arguments are different, both speakers assume that stem cell research can be successful.