Each passage below presents an academic argument that relies on an unstated foundational premise. Match each argument with the underlying necessary assumption on which its conclusion depends.
- Marine Biology: Deep-sea anglerfish species possess glowing lures populated by bioluminescent bacteria. Because newly hatched larvae sampled in the upper surface waters show no traces of these bacteria in their nascent lure tissue, adult anglerfish must acquire these bacterial symbionts directly from ambient seawater after descending to bathypelagic depths.Larval anglerfish in surface waters do not harbor undetectable dormant bacterial symbionts that become active and proliferate only after descent.
- Urban Climatology: A municipal department replaced dark asphalt with high-albedo reflective pavement to lower street surface temperatures. Midday ground-level sensors recorded an average pavement temperature reduction of 4°C. Therefore, installing high-albedo pavement across all streets will substantially reduce the overall heat stress experienced by pedestrians walking on them.The solar radiation reflected upward by the high-albedo pavement does not offset the cooling benefit by increasing the net thermal radiation absorbed by pedestrian bodies.
- Cognitive Linguistics: An isolated mountain community speaks an indigenous language that uses vertical elevation terms (uphill/downhill) to express temporal relationships (past/future). Because the speakers traverse steep mountain slopes every day, their local topography must be the primary cognitive source that gave rise to their conceptual model of time.The vertical temporal metaphor system was not inherited from an ancestral proto-language spoken prior to the community's settlement in mountainous terrain.
Answer
The marine biology argument pairs with the assumption excluding dormant surface symbionts; the urban climatology argument pairs with the assumption excluding increased upward radiant heat on pedestrian bodies; and the cognitive linguistics argument pairs with the assumption excluding ancestral linguistic inheritance prior to mountain settlement.
For each pairing, the matched statement serves as an indispensable foundational premise. In the marine biology argument, ruling out undetectable dormant surface bacteria is essential to deduce that acquisition must occur at depth. In the urban climatology argument, ruling out increased reflected heat absorption by pedestrians is required to conclude that cooler ground translates to lower human thermal stress. In the linguistics argument, ruling out pre-existing ancestral inheritance is required to attribute the metaphor's origin to local terrain.
Step-by-Step Solution
Key Concept
Necessary Assumption identification via the Negation Technique
Estimated Time:2m 0s