 The style of the Investigations is strikingly different from that of the Tractatus. Instead of strictly numbered sections which are organized hierarchically in programmatic order, the Investigations fragmentarily voices aphorisms about language-games, family resemblance, forms of life, “sometimes jumping, in a sudden change, from one area to another” (PI Preface). This variation in style is of course essential and is “connected with the very nature of the investigation” (PI Preface). As a matter of fact, Wittgenstein was acutely aware of the contrast between the two stages of his thought, suggesting publication of both texts together in order to make the contrast obvious and clear.