dumdu'o lujvo

x1 is the identity of x2

Brivla form of du'u x2 du ma kau. See kamdu'o, dubju'o

In notes:

lizdu'o
x1 is the subjective conscious experience of being x2; x1 is what it's like to be x2
kamcedu
x1 (ka) is the property/state of being x2