Day 15 is less about a single chart than about literature direction. The hysteresis signal from Communications Earth and Environment remains standing, and adjacent Nature-family publication streams are now treating overshoot as a governance condition, not a hypothetical branch in scenario space. [1][2]

The paper's Apr 23 entry centered asymmetry under CO2 drawdown. Day 15 broadens that frame. The key shift is epistemic: the burden has moved from proving overshoot relevance to proving overshoot reversibility assumptions are strong enough for policy planning. [1]

MSM mostly publishes climate papers one at a time. X's climate-policy and researcher networks increasingly publish them as a stack with cumulative consequence. The paper's position aligns with the stack reading. If overshoot is baseline and hysteresis is durable, then mitigation, adaptation, and carbon-removal policy cannot be designed around linear rewind logic. That is the practical argument now hardening in print.

-- DARA OSEI, London