What it means
Neither instrument has anything reassuring to report.
RAER asks whether deployed risk is converting into useful return. RAPF asks whether the profit being produced holds up as quality against the risk it consumed. Under Dual Weakness both answers are negative, which removes the interpretive move available in every other adverse state. Under-monetisation at least establishes that the execution is sound and the problem is located at the exits; profit-without-efficiency at least establishes that results are arriving, even if the risk consumed to produce them is not justified. Dual Weakness offers no such foothold. There is no half of the machine performing well enough to build a repair around, and that absence — rather than the severity of either individual reading — is what makes it categorically different.
Each adverse state leaves some part of the machine functioning, and the functioning part is what a repair is built on. Dual Weakness is defined by having none.

