Penguins Don't Fly: Reasoning about Generics through Instantiations and Exceptions. (arXiv:2205.11658v1 [cs.CL])

Generics express generalizations about the world (e.g., "birds can fly").
However, they are not universally true -- while sparrows and penguins are both
birds, only sparrows can fly and penguins cannot. Commonsense knowledge bases,
which are used extensively in many NLP tasks as a source of world-knowledge,
can often encode generic knowledge but, by-design, cannot encode such
exceptions. Therefore, it is crucial to realize the specific instances when a
generic statement is true or false. In this work, we present …

arxiv reasoning