"the plural of anecdote is (not) data."

[Sam Clements]

Did we do this one before?  Or am I just misremembering, having read it over at Straightdope, or somewhere else?

The "not" form seems to be cited only from 1999.  There are undocumented claims about "the plural of anecdote is data" form is from the early? 1990's.

This is probably a question for Barry or Doug.  I searched the NEW, WONDERFUL archives(Thanks, Grant), but found nothing.

Sam Clements