  The state of the art in human computer conversation leaves something to be
desired and, indeed, talking to a computer can be down-right annoying. This
paper describes an approach to identifying ``opportunities for improvement'' in
these systems by looking for abuse in the form of swear words. The premise is
that humans swear at computers as a sanction and, as such, swear words
represent a point of failure where the system did not behave as it should.
Having identified where things went wrong, we can work backward through the
transcripts and, using conversation analysis (CA) work out how things went
wrong. Conversation analysis is a qualitative methodology and can appear quite
alien - indeed unscientific - to those of us from a quantitative background.
The paper starts with a description of Conversation analysis in its modern
form, and then goes on to apply the methodology to transcripts of frustrated
and annoyed users in the DARPA Communicator project. The conclusion is that
there is at least one species of failure caused by the inability of the
Communicator systems to handle mixed initiative at the discourse structure
level. Along the way, I hope to demonstrate that there is an alternative future
for computational linguistics that does not rely on larger and larger text
corpora.
