Imagine that your friend James has just taken up the habit of smoking cigars because he thinks it makes him look cool. You are concerned about the detrimental effects of smoking on his health, and you raise that concern to him. James gets a bit annoyed with your criticism and says, "My grandfather smoked cigars, and he lived to be 100!" You might point out that a major problem with his argument involves单项选择题
A
the conjunction rule.
B
sample size.
C
none of these
D
framing.

Question

Imagine that your friend James has just taken up the habit of smoking cigars because he thinks it makes him look cool. You are concerned about the detrimental effects of smoking on his health, and you raise that concern to him. James gets a bit annoyed with your criticism and says, "My grandfather smoked cigars, and he lived to be 100!" You might point out that a major problem with his argument involves单项选择题

A

the conjunction rule.

B

sample size.

C

none of these

D

framing.

BlackTom AI · Accepted Answer

In this scenario, you’re evaluating a claim James makes about smoking cigars based on a personal anecdote. 
Option 1: the conjunction rule. The conjunction rule is a formal logical principle about the probability of two events occurring together, which would be more relevant in probabilistic reasoning about combined events. It does not capture the flaw in relying on a single anecdotal example to judge health effects, so this choice is not the best explanation for James’s argument.
Option 2: sample size. This is the key issue. James cites his grandfather living to 100 as evidence that smoking cigars is not harmful. A single or very small number of cases (a tiny sample) cannot establish a general truth about health risks for a population. This is a classic example of drawing a broad conclusion from an inadequate sample, ignoring variability and other risk factors.
Option 3: none of these. Since there is a valid flaw present (small sample size), this option is incorrect because it asserts that no listed problem applies, which overlooks the obvious issue of relying on an insufficient sample.
Option 4: framing. Framing refers to presenting information in a particular way to influence perception. While framing could play a role in how the argument is perceived, the central, strongest critique of James’s claim—especially in health risk terms—is the insufficiency of evidence due to a tiny sample size, not the way the information is framed.
Thus, the most accurate critique among the options is that the argument relies on sample size, not on a formal conjunction rule, framing, or an absence of any issue.