Below are four brief arguments from diverse academic and professional fields, each containing a characteristic flaw in its logical reasoning. Match each flawed argument with the abstract description that most accurately identifies its primary reasoning vulnerability.
- Paleoclimatologist: A team of independent geochemists recently claimed that sub-polar ice sheet stability during the mid-Pleistocene was substantially higher than previously estimated. However, two lead researchers on that team previously consulted for commercial mining syndicates seeking Arctic drilling permits. Therefore, the geochemical model proposed by their team is scientifically invalid.Discredits an empirical claim merely by calling into question the motives or background of the investigators who formulated it.
- Neuroscientist: A research subject will demonstrate enhanced synaptic consolidation in the hippocampus during sleep only if nocturnal slow-wave delta rhythms remain uninterrupted throughout the sleep cycle. Patient G maintained completely uninterrupted delta rhythms during last night's polysomnography study. Consequently, Patient G will inevitably exhibit enhanced hippocampal synaptic consolidation.Treats a condition that is required for a particular outcome to occur as though it were sufficient to ensure that the outcome will occur.
- Aviation Inspector: To eliminate pilot spatial disorientation during nighttime transatlantic flights, flight decks must either be equipped with tactile haptic-feedback flight yokes or rely entirely on autonomous neural-network navigation systems. Because aviation safety boards have determined that fully autonomous neural flight systems remain too untested for certification, flight deck overhauls must incorporate tactile haptic-feedback yokes.Bases a definitive course of action on the unsupported assumption that two proposed remedies exhaust the full range of available alternatives.
- Archivist: Every individual codex acquired in the recent monastic estate donation has been conclusively verified as dating from the early twelfth century. Since the complete donation consists exclusively of these authentic twelfth-century codices, the archival collection as an organized, cataloged institutional library must also have been established during the twelfth century.Illicitly concludes that an assembled entity possesses a particular attribute solely because every constituent component of that entity possesses that attribute.
Answer
The paleoclimatologist's argument matches the description of discrediting an empirical claim based on investigators' backgrounds; the neuroscientist's argument matches treating a necessary condition as sufficient; the aviation inspector's argument matches assuming two remedies exhaust all alternatives; and the archivist's argument matches illicitly transferring a property of individual parts to the assembled whole.
Each pair correctly matches an argument to its precise underlying structural flaw: the paleoclimatologist attacks the source rather than the claim; the neuroscientist confuses necessity with sufficiency; the aviation inspector presumes a false dichotomy between two solutions; and the archivist commits a part-to-whole fallacy of composition.
Step-by-Step Solution
Key Concept
Identifying formal and informal reasoning vulnerabilities in argument structures, including source arguments, conditional confusion, false alternatives, and compositional errors.