Language is ambiguous at the best of times, think about how much gets lost in translation. Imagine hearing a tribesman in a remote land utter the word "gavagai" upon seeing a rabbit. A speaker of English could do what seems natural and translate this as "Lo, a rabbit."   But other translations would be compatible with all the evidence she has: "Lo, food"; "Let's go hunting"; "There will be a storm tonight" (he may be superstitious).