Holmes's Character as a Detective

In the short story 'The Adventure of the Blue Carbuncle' by Arthur Conan Doyle, Sherlock Holmes discovers a lost gem and uses it to solve a mystery. Throughout the narrative, Holmes's keen observation skills and logical reasoning play pivotal roles. During one critical scene, Holmes analyzes the circumstances surrounding an incident involving a goose and its rightful owner. He notes how the details of the case are interwoven with themes of justice and moral integrity. By the end of the story, he not only reveals the fate of the gemstone but also reflects on the broader implications of his findings.

Based on this context, which of the following details best underscores Holmes's character as a detective?