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A paleontologist discovers a fossilized footprint trail indicating that a prehistoric animal walked on two legs. In a nearby rock layer, they find skeletal remains of a similar animal, but its bone structure suggests quadrupedal locomotion. Based on this evidence, the paleontologist infers that either two distinct species existed, or the animal underwent a significant evolutionary change in locomotion. This inference is an example of which scientific reasoning process?
- AAbductive reasoning, forming the most likely explanation from incomplete observations.
- BHypothetico-deductive reasoning, testing a hypothesis through predictions.
- CInductive reasoning, forming general conclusions from specific observations.
- DDeductive reasoning, moving from general principles to specific observations.
Show answer & explanationAnswer & explanation
Correct answer: A. Abductive reasoning, forming the most likely explanation from incomplete observations.
Abductive reasoning involves forming the most probable explanation from a set of incomplete observations. The paleontologist has two pieces of evidence (footprint, skeleton) that don't immediately align, leading to the 'best guess' explanations of two species or evolutionary change.
Why the other options are wrong
- B. Hypothetico-deductive reasoning involves testing a pre-existing hypothesis, which is not what the paleontologist is doing initially.
- C. Inductive reasoning involves generalizing from many specific instances, not forming a 'best fit' explanation for conflicting evidence.
- D. Deductive reasoning would start with a known rule and apply it, which isn't the case here.
Abductive Reasoning
A form of logical inference that starts with an observation or set of observations and then seeks to find the simplest and most likely explanation.
- Often used to generate hypotheses when evidence is incomplete.
- Provides a 'best guess' explanation, not a certainty.
- Common in diagnostic fields and scientific discovery.
Memory trick: Deduce, Induce, Abduce – wisdom's juice.