I'd frog the dang thing and use the yarn for something else. I do like to finish projects and one sock does not a finished project make, so unless I will do the 2nd (I never have that problem as I knit them 2 @ time) there is absolutely no point in finishing just one.
Cheating is an option. . . . Cheaters never win and winners never cheat, but smart knitters who want to retain an iota of sanity do, cheerfully. ~~Kory Stamper