the.com/sleuth

a detective whose superpower is noticing the boring thing everyone else ignored.

means To investigate carefully, following clues to uncover hidden facts — or a person, especially a detective, who does this.

from From Old Norse 'slóð,' meaning a track or trail. English first knew it in 'sleuth-hound' — a bloodhound that tracked prey or fugitives by scent. Over time the dog dropped away and the trailing skill stuck to the human; by the late 19th century, especially in American slang, 'sleuth' on its own meant a detective — someone who follows a trail of clues the way the hound followed a scent.

old norse
Sleuth meant a trail or track, not a person.
sleuth-hound
Originally a bloodhound; humans stole the nickname later.
group name
A gathering of bears is also a sleuth.
holmes effect
Real forensics adopted methods fiction popularized first.
for instance

sherlock holmes — fictional detective created by arthur conan doyle who solved 56 cases across 4 novels and 56 short stories

hercule poirot — belgian detective created by agatha christie who appeared in 39 novels and numerous short stories

nancy drew — teenage detective who has starred in over 200 mystery novels since 1930

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