We formalize cross-scale interference in systems operating across multiple temporal scales. When constraints at fast scales (seconds-minutes) interact with constraints at slow scales (months-years), constructive or destructive interference emerges. Constructive interference (Rcross > 0.7) produces amplification cascades and lock-in; destructive interference (Rcross < -0.3) creates damping and instability. This note demonstrates that multi-scale phenomena cannot be explained by single-scale models, establishing formal necessity for cross-temporal analysis in cognitive, organizational, and social systems.
Haluk Aksak (2026) studied this question.