Independent Researcher

This paper presents LBTBB (Laat Bestaande Theorieën Buiten Beschouwing — Leave Existing Theories Out of Consideration), a methodological principle for foundational theory construction in which internal coherence is developed to a self-sustaining degree before comparison with existing frameworks is undertaken. The method is motivated by the observation that premature incorporation of external frameworks tends to suppress the structural distinctiveness of an emerging theory before its internal architecture is sufficiently developed to survive the comparison. The paper introduces three associated concepts: the Δ-zone (the formal boundary where argument ends and axiomatic choice begins), Architectural Modesty (the principle that every architectural choice must explicitly refer to the Δ-zone from which it originates), and the Falsification Horizon (the explicit registration of what a theory cannot reach from its own internal resources). These concepts are illustrated through the Lindersberg-Codex, a foundational framework for theoretical physics developed independently over six decades, in which differentiability serves as the transcendental primitive (ZP0). The neutrino mass prediction Σmν ≈ 58 meV, derivable internally from the Codex structure, serves as a concrete falsification checkpoint: the Euclid satellite DR1 release (October 2026) provides an external test with falsification.