Symbolism of Watson and Holmes

Describe what Detectives Sherlock Holmes and Watson symbolize. Their relationship in itself should probably be an important symbolic attribute The story it comes from is from Arthur Conan Doyle's "A Scandal in Bohemia" (1891) I need 3 examples of symbolism in this story. The prompt states "A discussion of one or more characters in a work: are they symbolic?" What do they symbolize?                                                      

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