Before revision:  However, as cells are added, removed, reordered, and rerun, this hidden intermediate state accumulates in a way that is not necessarily correlated with the code visible in the notebook's cells , making execution behavior difficult to reason about, and leading to errors and lack of reproducibility.
After revision:  However, as cells are added, removed, reordered, and rerun, this hidden intermediate state accumulates in a way that is not necessarily correlated with the code visible in the notebook's visible code , making execution behavior difficult to reason about, and leading to errors and lack of reproducibility.