Full Idea
Sometimes we want to count the ways in which something is possible, or say that there are many ways in which a certain thing is possible.
Gist of Idea
Sometimes we want to specify in what ways a thing is possible
Source
Joseph Melia (Modality [2003], Ch.2)
Book Reference
Melia,Joseph: 'Modality' [Acumen 2003], p.31
A Reaction
This is a basic fact about talk of 'possibility'. It is not an all-or-nothing property of a situation. There can be 'faint' possibilities of things. The proximity of some possible worlds, especially those sharing our natural laws, is one answer.