Match each flawed argument below with the most accurate description of its specific causal reasoning error.
- Recent epidemiological analyses reveal that patients who regularly consume prescribed synthetic probiotics exhibit a significantly higher incidence of chronic gastrointestinal inflammation compared to those who do not. The medical board has thus issued a warning that synthetic probiotics are a catalyst for chronic digestive disorders.Infers a causal relationship from a statistical association while ignoring the possibility that the factor identified as the cause may actually be a response to the factor identified as the effect.
- A university study found that students who sleep fewer than six hours per night during the week of final exams consistently score lower on their assessments than those who sleep eight hours or more. An academic memo concluded that sleep deprivation directly impairs students' analytical abilities during these exams.Takes a correlation between two phenomena as definitive evidence of a direct causal link, overlooking the strong likelihood that both phenomena are the independent effects of an unstated third variable.
- Following a sweeping initiative to replace all incandescent lighting with LED fixtures across its assembly lines, a heavy machinery manufacturer noted a 15 percent drop in employee injury rates over the next six months. Plant managers confidently reported that the improved illumination provided by the LEDs was directly responsible for the enhanced safety record.Assumes that an intervention successfully caused a reduction in an adverse outcome merely because the reduction followed the intervention, ignoring the potential impact of other concurrent changes.
- A decadal wildlife survey in the northern boreal forests demonstrates that years characterized by a significantly expanded population of snowshoe hares are predictably followed by years with an increased population of predatory lynx. A local naturalist concluded that the influx of lynx into the ecosystem directly stimulates the snowshoe hares to breed more rapidly in order to ensure species survival.Interprets a causal mechanism in a way that contradicts the observed temporal sequence of the correlated events, erroneously attributing an earlier phenomenon to a later occurrence.
Answer
The epidemiological argument matches with reversing cause and effect; the university study matches with failing to consider a third variable; the manufacturing firm matches with assuming a chronological sequence implies causation while ignoring concurrent changes; and the ecological survey matches with contradicting the established temporal sequence.
Each argument commits a specific, distinct variation of a causal reasoning flaw. The biomedical argument reverses cause and effect, ignoring that a pre-existing condition likely necessitates the treatment. The university study ignores a common cause (like anxiety) that could independently trigger both variables. The manufacturing firm commits a post hoc fallacy, assuming a chronological sequence guarantees causation while ignoring concurrent systemic changes. Finally, the ecological survey proposes a causal timeline that contradicts its own premise, attributing a past event to a future cause.
Step-by-Step Solution
Key Concept
Distinguishing between specific subtypes of correlation-to-causation fallacies, including reverse causation, third-variable flaws, post hoc reasoning, and temporal paradoxes.