No, they are a myth
Here is a couple possibles, Engine or transmission oil leaking onto the hot exhaust. Plastic shopping bag caught onto exhaust system. Yesterdays chilli
Green
The cast of Le quatuor des possibles - 1993 includes: Bruno Ganz as Voiceover
9999
A theory.
The sack worn by mountain men around their necks was called "a bullet pouch."
The cast of Les vies possibles de Christian Boltanski - 2010 includes: Christian Boltanski as himself
Depending on the context, alternate or exigency are possibles.
the possibles are end less!!
yolk
There are several possibles - try 'Jack the lad'.