ribga experimental gismu

x1 is a logical statement that x2 (du'u) is true regardless of/irrespective of/independent of/whether or not x3 being/is true.

This word is to ju as kanxe is to je. Of course, x3 could depend on x2; it is just not the case that the reverse is true. See also: kanxe, vlina, ju.

In notes:

x1 is a connective question, requesting the connective between x2 (du'u) and x3 (du'u) in that order, assuming that they are true.
x1 is a material conditional/'IF' statement (logical statement) saying that x2 (du'u) logically implies x3 (du'u) ("x3 is true if x2 is true; if x2, then x3; x2 being true is sufficient to guarantee the truth of x3").
x1 is a logical statement of proposition-equivalence/is a biconditional/'IFF' statement saying that x2 (du'u) is true if and only if x3 is true ("x2 is logically equivalent to x3; x2 being true is sufficient and necessary for guaranteeing the truth of x3; x2 iff x3").