This afternoon, I am unconceeding defeat in the 1991 Onondaga County High School chess championships.
Eighteen years ago, after "losing" the semifinals to a freshman from Manlius Pebble Hill, I was pressured into conceding by a shadowy coalition of MPH chess team members (who hosted the competition, and probably sent messages to my opponent during the match), my employer at the time, Wegman's (who wanted me to work that night), and my teammate Julian Marshall, who went on to "win" the championship. Julian was afraid I would defeat him if I advanced to the final (I mean, I like totally beat Julian about 45% of the time in high school).
Further, I am unconceding defeat in my campaign to make Bel Biv DeVoe's "Do Me" our class song in high school. There is no way that "Everything I do, I it do for you" by Bryan Adams represented our class that year.
What are you unconceding?