In the extreme, a study will offer an account of one case (e.g., “a learning pathway…”) Other studies offer accounts of a range of contrasting cases to show what similarities and differences may found across cases. Neither paradigm solves “the problem of induction” (how to draw general conclusions from specific examples), reminding us of the value of complementary approaches (see Chapter3), or “grounded theory” approaches (discussed below), which offer ways of building general models, starting from specific case.