"Current difficulties in achieving intersubjective agreement"
So began the abstract of Bill Labov's 1972 paper "Some principles of linguistic methodology":
Current difficulties in achieving intersubjective agreement in linguistics require attention to principles of methodology which consider sources of error and ways to eliminate them. The methodological assumptions and practices of various branches of linguistics are considered from the standpoint of the types of data gathered: texts, elicitations, intuitions and observations. Observations of the vernacular provide the most systematic basis for linguistic theory, but have been the most difficult kinds of data for linguists to obtain; techniques for solving the problems encountered are outlined. Intersubjective agreement is best reached by convergence of several kinds of data with complementary sources of error.
1972 was when I got out of the U.S. Army, after returning from Vietnam, and started graduate school at MIT. Leaving one war I didn't believe in, I found myself enlisted in another — because what Bill called "current difficulties in achieving intersubjective agreement" was a euphemistic way of describing the religious wars then consuming the field of linguistics. Some of the theological leaders had become established elsewhere (George Lakoff, Jim McCawley, and Paul Postal), but Haj Ross and Dave Perelmutter were starting guerilla campaigns within MIT, where Noam Chomsky and Morris Halle were the intellectual government.
I respected and even admired all of the people just named, and learned meaningful lessons from their work. Focusing on the analysis of prosody helped me to avoid the worst of the intellectual killing fields. But I saw no real way to stay neutral in that period of academic linguistics, any more than I could have in 17th-century central Europe. Which is why I finished grad school in three years, and spent the next 15 years in an industrial research job.
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