kamdu'o lujvo

x1 is the identity function/equality relation

brivla form of ka ce'u du ma kau.

In notes:

dumdu'o
x1 is the identity of x2
kamcedu
x1 (ka) is the property/state of being x2
mazdu'osre
x1=s1 confuses the identity of x2=d1 as x3=s2=d2=m, a confusion under conditions x4=s3 by standard x5=s4; x1 mistakes x2 for x3.