This volume supplements the original 1972 version with two 1912 essays: “The Problem of Reality in Modern Philosophy” and “Recent Research in Logic” (glossing writings of Husserl, Meinong, Lask, Geyser, and Frege). It also contains Heidegger’s 1913 doctoral dissertation “The Doctrine of Judgment in Psychologism: A Critical-Positive Contribution to Logic,” his 1915 habilitation “Duns Scotus’ Doctrine of Categories and Meaning,” and his 1916 essay “The Concept of Time in the Science of History.” On display is Heidegger’s early interest in the grounding of logic, from Neo-Kantian and Husserlian perspectives, i.e. irreducible to psychology and pre-occupied with the problem of categories.