A policeman, while on his usual late night patrol, finds a well dressed gentleman squatting under a streetlight.
“Is there a problem sir? Are you looking for something?” Policeman asked the man.
“I lost my car keys officer.” Replied the gentleman.
“Do you need some help?”
“Thanks. I sure could use some help. It’s been an hour since I lost my keys and can’t find them.”
So they both started looking under the streetlight together. After about half an hour, the policeman asks, “Where exactly did you lose your keys?”
“Oh, I actually lost them in the park, half a kilometre down this road.”
“Then why in the world are you searching here under the streetlight?”
“Because this is where the light is.” The gentleman replies with shrug and a look of obviousness on his face.
This might look like a party joke but it has important clues about human behaviour. Please allow me to explain.