 The spiritual father of subvaluationism is Georg Hegel. For Hegel, the basic kind of vagueness is conflict vagueness. The shopper in between the wings of a revolving doorway is both inside the building and outside the building. Degree vagueness is just a special case of the conflict inherent in becoming. Any process requires a gradual manifestation of a contradiction inherent in the original state. At some stage, a metamorphosizing caterpillar is not a butterfly (by virtue of what it was) and a butterfly (by virtue of what it will be). Hegelians believed this dialectical conception of vagueness solved the sorites and demonstrated the inadequacy of classical logic (Weber 2010). The Russian Marxist Georgi Plekhanov (1908 [1937]) proposed a logic of contradiction to succeed classical logic (Hyde 2008, 93–5). One of his students, Henry Mehlberg (1958) went on to substitute gaps for gluts. The first version of supervaluationism is thus a synthesis, reconciling the thesis of classical logic with the anti-thesis posed by the logic of contradiction.