declare R1 R2 X R1 = pig(weight:100) R2 = pig(weight:X) {Browse R1 == R2} % But if the following is fed separately, later, the browser shows true X=100 declare R1 R2 X R1 = pig(weight:X) R2 = pig(weight:X) {Browse R1 == R2} declare R1 R2 X Y X = Y R1 = pig(weight:X) R2 = pig(weight:Y) {Browse R1 == R2} declare R1 R2 X R1 = horse(weight:X) R2 = pig(weight:X) {Browse R1 == R2}