I think this is more a problem of deixis or indexicality than of self-reference particularly. https://en.wikipedia.org/wiki/Indexicality#In_linguistic_pragmati

I think this is more a problem of deixis or indexicality than of self-reference particularly. https://en.wikipedia.org/wiki/Indexicality#In_linguistic_pragmatics https://en.wikipedia.org/wiki/Indexicality#In_linguistic_pra... https://en.wikipedia.org/wiki/Deixis https://en.wikipedia.org/wiki/Deixis For example, if I say "it's sunny out now" or "today is a warm day" or "Berkeley is east of here" I also run into problems related to the prospect that references may not have the same referent in different contexts. (For example, two speakers can respectively affirm and deny each of these propositions even though they may both agree in all of their beliefs!) The example that you give can also be interpreted as a deictic problem because the referent of "this sentence" can change from sentence to sentence, even though we normally don't expect the referents of noun phrases to change this way.