Challenges of NLP The problem of representation and interpretation. Natural languages are highly ambiguous and vague achieving such representation is difficult. The inability to capture all required knowledge is another difficulty. It is almost impossible to embody all sources of knowledge that humans use to process language. Identifying its semantic- context in which word is used. Quantifier scoping is another problem. The scope of quantifier is not clear (i.e the, each, etc.) The ambiguity of natural language is difficult. Word level ambiguity- a word may be ambiguous in part of speech or ambiguous in meaning