A split between 1st and 2nd person versus 3rd person marking is more likely with the verbal category assertive than with the category non-assertive.
Standardized
IF there is a split between 1st and 2nd person versus 3rd person marking, THEN this split is more likely with the verbal category assertive than with the category non-assertive.
Can easily be redone as an implication, like in #1885.