Sentence:  A memory is "<WSD>precise</WSD>" when the occurrences that would verify it are narrowly circumscribed: for instance, "I met Jones" is <WSD>precise</WSD> as compared to "I met a man." A memory is "accurate" when it is both precise and true, i.e. in the above instance, if it was Jones I met. 
Meaning of the word marked with <WSD> tags:  exact, accurate