
Everyone is looking for the lost key under the lamppost… The Streetlight Effect ((The streetlight effect is a type of observational bias where people only look for whatever they are searching by looking where it is easiest.[1][2][3][4] The search itself may be referred to as a drunkard’s search.
Taken from an old joke about a drunkard who is searching for something he has lost, the parable is told several ways but typically includes the following details: