A more interactional view on speech acts

Situation 1:
charge/rebuttalA: The vacuum cleaner was your responsibility.
B: I fixed it yesterday.
Situation 2:
request/compliance A:May I use the vacuum cleaner now?
B:I fixed it yesterday.
Conversation analysis promotes a sequential reading of the functional value of particular utterances. B's turn in situation 1 counts as a "rebuttal" because it follows a turn which is heard as a "charge" (rather than that interpretation being conditional upon certain logical properties of individual utterances - as is argued within conventional speech act theory). Support for such a conclusion can be found in the following observation: the speech act value of the very same utterance changes, when it is inserted into a different type of sequence (see situation 2).