Coverage we define as atomic unit recall, representing how much reference information is present in the generated text. Unlike hallucination, here generated text forms the atomic premises (P j ) and the reference text the hypotheses (H i ). The NLI model constructs an entailment probability distribution for each H i against all P j , such that p i,j = (E i,j |P j , H i ), resulting in an M N ×L matrix of entailment probabilities E i,j .