1> Level words>> Eg, prA's use of a word is not always the same with that of prB.  Is the definition of word 'language' the same with that of Random House Dictionary?  Not at all.  Maybe prA's definition of 'language' is bigger than that of prB.  Or the contrary.
2> Level sentence>> A sentence is built up of, in very short, <S+V+O>.  Three elements.  Given the word for S has four kinds of definition in prA's thinkings, And in prB's thinkings five.  Skip V.  Given the word for O has five in prA...
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