2016

Reasoning About Entailment With Neural Attention

Tim Rocktaschel, Edward Grefenstette, K. Hermann, T. Kocisky, Phil Blunsom

citations

Cite Score

34

AI summary

This paper introduces a neural model using LSTMs and a word-by-word neural attention mechanism for recognizing textual entailment, achieving state-of-the-art accuracy of 83.5% on the SNLI dataset, demonstrating improved reasoning capabilities through qualitative analysis of attention weights.

Main Contributions

  • Introduces a neural model based on LSTMs for recognizing textual entailment.
  • Extends the model with a word-by-word neural attention mechanism.
  • Provides a qualitative analysis of neural attention for RTE.
  • Achieves an accuracy of 80.9% on SNLI with a benchmark LSTM, outperforming a simple lexicalized classifier.
  • Sets a new state-of-the-art accuracy of 83.5% for recognizing entailment on SNLI by extending the benchmark LSTM with word-by-word neural attention.

Abstract

While most approaches to automatically recognizing entailment relations have used classifiers employing hand engineered features derived from complex natural language processing pipelines, in practice their performance has been only slightly better than bag-of-word pair classifiers using only lexical similarity. The only attempt so far to build an end-to-end differentiable neural network for entailment failed to outperform such a simple similarity classifier. In this paper, we propose a neural model that reads two sentences to determine entailment using long short-term memory units. We extend this model with a word-by-word neural attention mechanism that encourages reasoning over entailments of pairs of words and phrases. Furthermore, we present a qualitative analysis of attention weights produced by this model, demonstrating such reasoning capabilities. On a large entailment dataset this model outperforms the previous best neural model and a classifier with engineered features by a substantial margin. It is the first generic end-to-end differentiable system that achieves state-of-the-art accuracy on a textual entailment dataset.

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