I think I understand the point. My question is: Does the following sentence fall into this category? Does it show "a general possibility"?
Every year, about one billion tourists travel around the world. Tourism is traveling for entertainment, health, sport or learning about the culture of a nation. Tourism can be domestic or international. Domestic tourists travel to different parts of their own country. International tourists travel abroad. (Source: Iran's English Coursebooks)
Hi, Freeguy: Yes, "can" does indicate a general possibility right there. The sentence means that when tourism is spoken of, it is possible that either domestic tourism or international tourism is being spoken of.