The approach to RTE taken in this paper follows the Lexical Overlap Hypothesis (LOH), which states that the higher the number of lexical matches between T and H, the more likely the T-H pair is entailing rather than non-entailing (Zeller, 2016).
h is more likely to be entailed by T if most of its lexical content also occurs in T. While this hypothesis is a simplification of the TE problem, it has been shown to perform reasonably well for some datasets .