  The ability to understand logical relationships between sentences is an
important task in language understanding. To aid in progress for this task,
researchers have collected datasets for machine learning and evaluation of
current systems. However, like in the crowdsourced Visual Question Answering
(VQA) task, some biases in the data inevitably occur. In our experiments, we
find that performing classification on just the hypotheses on the SNLI dataset
yields an accuracy of 64%. We analyze the bias extent in the SNLI and the
MultiNLI dataset, discuss its implication, and propose a simple method to
reduce the biases in the datasets.
