Why is NLP hard? Languageambiguity: Structural The man saw the boy with the binoculars. Flying planes can be dangerous. Hole found in the room wall; police are looking into it. Languageimprecision and vagueness It is very warm here. Q: Did your mother call your aunt last night? A: I’m sure she must have. Why is NLP hard? Week 1: Lecture 3 3 /16