How to Play
We can treat RTE as a classification task, in which we try to predict the True / False label for each pair. Although it seems likely that successful approaches to this task will involve a combination of parsing, semantics and real world knowledge, many early attempts at RTE achieved reasonably good results with shallow analysis, based on similarity between the text and hypothesis at the word level. In the ideal case, we would expect that if there is an entailment, then all the information expressed by the hypothesis should also be present in the text. Conversely, if there is information found in the hypothesis that is absent from the text, then there will be no entailment.