There remains one other sort of expression that from the beginning Frege regarded as tonal that I want to consider briefly before extending this survey. This sort includes his example of the adverbs 'still" and "already". Resisting Frege's treatment, I shall urge that this pair, and other terms like these two, are to be understood in terms of contributions that the individual words make to the sense, and not to the tone, of sentences in which they occur. While it may be conceded tofrege that for a large number of cases their presence makes no difference to the truth or falsity of an embedding sentence, in other linguistic environments they do precisely this. And yet the adverbs mean the same in both kinds of cases. The principle of parsimony, of semantic innocence, ought not and need not be abandoned.