“The mind, if preoccupied with a problem or question long enough, will tend to come up with possibilities that might eventually lead to answers, but at this stage are still speculations, untested hypotheses, and early epiphanies. (Epiphanies often are characterized as “Aha! moments,” but that suggests the problem has been solved in a flash. More often, insights arrive as What if moments—bright possibilities that are untested and open to question.)”