Casa ESL · C2 Mastery · Unit 13 of 20 · Step 2
Precision in language — implies, infers, suggests, demonstrates
Name
Date
Vocabulary
autonomy
nounThe right of a patient to make informed decisions about their own medical care.
"Patient autonomy is a cornerstone of modern medical ethics."
beneficence
nounThe ethical obligation to act in the best interest of the patient.
"The principle of beneficence sometimes conflicts with respect for patient autonomy."
non-maleficence
nounThe ethical obligation to do no harm.
""Primum non nocere" — first, do no harm — encapsulates the principle of non-maleficence."
informed consent
nounPermission granted with full knowledge of the possible risks and benefits.
"Informed consent requires that the patient understand the procedure, its risks, and its alternatives."
palliative
adjectiveRelieving pain or alleviating a problem without dealing with the underlying cause.
"Palliative care focuses on quality of life rather than cure."
triage
nounThe process of determining the priority of patients' treatments based on the severity of their condition.
"In mass casualty events, triage decisions carry profound ethical weight."
placebo
nounA substance with no therapeutic effect, used as a control in testing new drugs.
"The ethical use of placebos in clinical trials remains a subject of debate."
prognosis
nounThe likely course of a disease or ailment; a forecast.
"The prognosis was guarded — the data suggested improvement was possible but not certain."
Grammar Focus
Evidential verbs — implies, infers, suggests, demonstrates
At C2 level, the precise choice of evidential verb signals the strength and nature of the claim. "Demonstrates" / "establishes" = strong evidence, near-certainty. "Indicates" / "shows" = clear evidence. "Suggests" = evidence is supportive but not conclusive. "Implies" = the evidence points toward a conclusion indirectly. "Infers" = the reader/analyst draws a conclusion (NOT the data — data do not infer). Common error: confusing "implies" (speaker/text conveys) with "infers" (listener/reader concludes). "The data imply X" is correct; "The data infer X" is wrong.
The trial demonstrates a statistically significant reduction in mortality. (strong claim)
The findings suggest that early intervention may improve outcomes. (moderate claim)
The correlation implies a possible link between diet and disease progression. (indirect, tentative)
From these results, we may infer that the treatment is effective in certain populations. (the researcher infers — not the data)
Exercises
Exercise 1
Choose the correct evidential verb: demonstrates, suggests, implies, infers, indicates.
1. The randomised controlled trial a 40% reduction in recurrence. (strong evidence)
2. The preliminary data a possible benefit, though larger studies are needed.
3. The absence of side effects in the control group that the drug, rather than the condition, was responsible.
4. From the available evidence, the clinician that the patient was responding to treatment.
5. The imaging results clearly structural abnormalities in the prefrontal cortex.
Exercise 2
Choose the sentence that uses the evidential verb correctly.
1. Which is correct?
2. Which most appropriately expresses a strong finding?
3. Which is appropriate for a preliminary finding?
4. Who infers — the data or the researcher?
5. Which best expresses indirect evidence?
Reading
The Weight of Words in Medicine
In medicine, the difference between "suggests" and "demonstrates" can be the difference between a treatment that is adopted and one that is not — between a patient who receives a potentially life-saving intervention and one who does not. The precision of evidential language is not merely an academic nicety; it carries clinical consequences. When a paper states that a drug "demonstrates" efficacy in a Phase III trial, it signals that the evidence meets the highest evidentiary threshold: randomised, controlled, statistically significant, and replicated. When a paper states that a biomarker "suggests" a predisposition, it signals that the evidence is promising but preliminary — sufficient to warrant further investigation, but not to justify clinical action. The confusion between "implies" and "infers" — common even among educated speakers — takes on particular gravity in medical contexts. A radiograph implies (conveys indirectly) that a fracture may be present; the radiologist infers (concludes) from the image that the bone is broken. The image does not infer anything; it is an artefact, not an agent. These distinctions matter because imprecise language breeds imprecise thinking, and in medicine, imprecise thinking can cost lives. A clinician who writes "the evidence demonstrates" when they mean "the evidence suggests" risks overstating a finding, potentially leading to premature adoption of an unproven treatment. Conversely, writing "suggests" when "demonstrates" is warranted may delay the implementation of a life-saving therapy.
1. What clinical consequences does the passage identify for imprecise use of evidential verbs?
2. How does the passage explain the distinction between "implies" and "infers" using a medical example?
Speaking
Discuss these questions with a partner or your teacher.
Writing
Write a short abstract (120-150 words) for an imaginary medical study. Use at least four different evidential verbs, each calibrated to the appropriate strength of claim.
Example: This randomised controlled trial demonstrates a statistically significant reduction in systolic blood pressure among patients receiving the novel antihypertensive agent X-401 compared to placebo (mean reduction 12.3 mmHg, p < 0.001). Secondary analysis indicates that the effect was more pronounced in patients aged over 60. Subgroup data suggest a possible interaction with concurrent statin therapy, though this finding did not reach statistical significance and requires further investigation. The low incidence of adverse events implies a favourable safety profile, though longer-term data are needed to establish this conclusively. We infer from these results that X-401 represents a promising addition to the antihypertensive armamentarium, warranting Phase IV surveillance and real-world effectiveness studies.
Answer Key — For Teacher Use
Exercise 1
1. demonstrates · 2. suggest · 3. implies · 4. inferred · 5. indicate
Exercise 2
1. The data imply a correlation. · 2. The results demonstrate a clear benefit. · 3. Early results suggest a trend toward improvement. · 4. The researcher infers from the data. · 5. The pattern implies a genetic component.
Reading Comprehension
1. Overstating evidence ("demonstrates" instead of "suggests") may lead to premature adoption of unproven treatments; understating it ("suggests" instead of "demonstrates") may delay implementation of life-saving therapies. · 2. A radiograph implies (conveys indirectly) that a fracture may be present; the radiologist infers (concludes) from the image that the bone is broken. The image is an artefact, not an agent — it cannot infer.