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Question
What would prove the Kronos design wrong?
Specific, pre-registered results would. If the G1 testbed shows negative-triangularity confinement below the required threshold, the design must be re-sized — and Kronos would publish it.
A design that can't be proven wrong isn't science. Kronos makes its falsification conditions explicit through the Falsifiable Seven and the gates, with the confinement bet as the load-bearing one.
Questions & answers
Is the Kronos design falsifiable?
Yes — deliberately. Kronos pre-registers seven predictions (the Falsifiable Seven) with specific numerical thresholds, each tested at a gate. If a result comes in below threshold, the prediction is refuted, and Kronos commits to publishing that outcome.
Give a concrete example.
Prediction P1 is that negative-triangularity confinement reaches H98 ≥ 1.3 (ELM-free) at the design shape. If the G1 confinement testbed measures confinement below the level the design needs, the machine must be re-sized along a stated fallback — which would materially worsen the economics. Kronos says so openly.
What's the single most consequential test?
The confinement requirement (H98 = 1.84), verified first by nonlinear gyrokinetics and then at G1. It is the largest bet in the program, and the one whose failure would most change the design.
Honest gapIf G1 shows negative-triangularity confinement below the required level, the design re-sizes along a stated fallback with materially worse economics — a negative result Kronos commits to publish.