Logical Holism and Wittgenstein’s ‘Practical Turn’. – Logical holism is the idea that each elementary proposition belongs to a system and is logically connected to other propositions of that system. In this paper I explore this idea and draw its connections to the nature of negative propositions and the ‘problem of recognition’ on the basis of Wittgenstein’s Nachlass. In the first section I argue that in January 1930 the idea leads Wittgenstein to a better understanding of how the negative feature (...) is expressed in propositions, thereby raising the problem of recognition to which he is not yet able to find a proper solution. In the second section I explore how the problem still persists during Wittgenstein’s ‘practical turn’. What he now calls the ‘problem of representation’ forces him to change again his conception of propositions. In the final section I argue that this change is mainly due to the modification of his conception of hypotheses which urges a solution to the problem of representation, though the problem remains unsolved in January 1930. (shrink)