ABSTENTION: law A V*=3/4 coverage(precision>=9/10)=1/2; law B V*=3/4 coverage(precision>=9/10)=0; equal V*: True
EXTRA SIGNAL: V*(null S)=1/2, coverage C=3/4; a policy that also observes T=(Y1,Y2) reaches 3/4
GARBLE: V*(A)=3/4 -> V*(merged)=3/4
