Utterance, interpretation and the logic of indexicals

I argue that some utterances of sentences containing occurrences of indexical expressions should not be evaluated with respect to the context of utterance. I suggest that we distinguish between context of utterance and context of interpretation, and I employ this distinction in the analysis of recorded messages and other interesting linguistic phenomena. I then discuss the implications of my views on contexts with respect to the logic of indexicals. Against the traditional view, I argue that sentences such as 'I am here now' or 'something exists' should not be treated as logical truths.