(2018) defined this term when they found that the leaveone(token)-out (LOO) method might find a completely different set of most influential words if the most un-influential word is dropped from the sentence.
we do not observe this problem in our case: out of 419 predictions, 379 times the most influential word remains the most influential and 33 times it becomes the second most influential one after we drop the most un-influential words.