dunlixu fu'ivla

Either both x1 and x2, or neither x1 nor x2, satisfy predicate x3

See dunli, dunlija, dunlini, dunliki

In notes:

dunlija
x1 and x2 both satisfy predicate x3
dunliki
Something is such that both x1 and x2 are related to it by predicate x3. x4 [quantifier] thing to which x1 is related by predicate x3 is such that x2 is related to it by predicate x3.
dunlini
x1 and x2 satisfy predicate x3 to the same extent