Final answer:
The proper noun in the sentence is 'Mr. Sherlock Holmes', a fictional character created by Sir Arthur Conan Doyle.
Step-by-step explanation:
The proper noun in the sentence 'Mr. Sherlock Holmes is a famous fictional detective' is Mr. Sherlock Holmes. Sherlock Holmes was not a real person; he was the creation of British author Sir Arthur Conan Doyle.
This character is renowned for his exceptional deductive abilities, harnessing the power of observation and logic to solve complex mysteries in literature. Holmes is often considered a mythical person due to his extraordinary capabilities, far surpassing those of a typical detective.
In the literary world, the distinctive proper noun "Sherlock Holmes" is synonymous with unparalleled detective prowess. Created by Sir Arthur Conan Doyle, Holmes stands as an enduring figure celebrated for his brilliant deductive reasoning.
The character's fame extends beyond literature, influencing various adaptations in film, television, and other media. "Sherlock Holmes" epitomizes the quintessential fictional detective, leaving an indelible mark on the detective genre.
Whether unraveling mysteries in Doyle's stories or gracing contemporary adaptations, the name carries a cultural resonance, embodying the epitome of investigative brilliance and intellectual acumen in the world of fiction.