The Three Evolutionary Vectors of Human Knowing
The long climb from feeling to fact
Human knowing comes in three genuinely distinct forms — personal experience, shared cultural understanding, and objective science — and no one has yet explained how they fit together. This insight maps their evolutionary sequence and argues that a complete epistemology must honor all three.
The Translation
AI-assisted summaryFamiliar terms
Donald Davidson identified what he called three irreducible vectors of empirical knowledge: the subjective, the intersubjective, and the objective. What makes this Tripartite structure philosophically significant is not merely that these domains are distinct, but that they are historically and evolutionarily sequenced. phenomenological subjectivity — the first-person encounter with the world — is the oldest epistemological reality, arising with sentient life itself. Intersubjectivity, the propositional and normative networks that bind language-using communities into shared frameworks of justification and identity, emerged with human symbolic culture. Objective natural science, the project of generating mind-independent claims about reality, is the most recent vector, born from within the intersubjective matrix yet oriented beyond it.
The crucial complication is that scientific objectivity is itself intersubjectively produced. Replication, peer validation, and shared mathematical languages are irreducibly social processes. Science therefore achieves a kind of intersubjectively generated objectivity — it transcends any particular perspective, but cannot be constituted without perspectival, communal infrastructure. This means the word "empirical" cannot be the exclusive property of natural science; phenomenological and cultural knowing are also genuinely empirical in their respective registers.
The Unified Theory of Knowledge addresses this by assigning distinct but coordinated frameworks to each vector: the Tree of Knowledge for objective scientific knowledge, the iQuad Coin for subjective phenomenological experience, and the Garden for intersubjective cultural knowledge. The goal is not synthesis or reduction but coherent relation — enabling a person to simultaneously inhabit their unique idiographic experience, their nested cultural identity, and their access to scientific knowledge without those modes fracturing into contradiction. The Enlightenment Gap names precisely the wound that opened when science, in factoring out the subject, began treating subjectivity as epistemologically void.