Final answer:
The details provided in the text do not directly support the claim that the fisherman felt he had the capability to defeat the genie as none of the snippets mention the genie or the fisherman's confidence in his abilities regarding such a scenario.
Step-by-step explanation:
The details that support the claim that the fisherman felt he had the capability to defeat the genie revolve around his wit and cleverness through his negotiation tactics rather than magical powers or specific knowledge about the genie. The specific details from the text that could suggest the fisherman's confidence in his ability to handle the genie include his experience with and opinions on fish, his reasoning and logic when dealing with accusations of sorcery, and his overall demeanor when confronting supernatural circumstances, though none of these instances directly mention a genie or provide concrete evidence of the fisherman's confidence in defeating one. Considering the provided text snippets, none directly support claims of the fisherman's capability to defeat the genie, suggesting that the correct answer choice is not present in the given information.