But most possibles are not bare, they are concretely grounded, or well-grounded, as we say. What does this mean pragmatically? It means, not only that there are no preventive conditions present, but that some of the conditions of production of the possible thing actually are here. Thus a concretely possible chicken means: (1) that the idea of chicken contains no essential self-contradiction; (2) that no boys, skunks, or other enemies are about; and (3) that at least an actual egg exists. Possible chicken means actual egg--plus actual sitting hen, or incubator, or what not. As the actual conditions approach completeness the chicken becomes a better-and-better-grounded possibility. When the conditions are entirely complete, it ceases to be a possibility, and turns into an actual fact.
William James, Pragmatism, Lecture 8: Pragmatism and Religion