Yesterday was depressing.

While the game was just plain sad, with our team making lots of silly mistakes and us ending up losing to NCState, who we should have beaten, the thing about my day that really bugged me was that between class and the game, I spent three hours on a Bioprocess Engineering problem. Actually, more like three and a half.

After nine pages of attempts to solve it I understood everything except I thought I needed a death rate constant, which the book didn't give. So I emailed the TA.

His response: "Are you sure you're doing problem 9? Problem 10 isn't assigned."

I look at the homework sheet, at my book, and I'm definitely doing problem nine like we're supposed to.

Except--except--the topic is wrong. I was doing "Cell Growth" on page 335, and needed to be doing "Biomass and Substrate Concentrations in a Chemostat" on page 334--but I was doing problem 9.

My book is mislabeled.

Freaking hell. Three hours on a problem that's not assigned. Knowledge for knowledge's sake, whatever.

In any case, now I have the whole homework to do since even though I worked for three hours and did nine pages I haven't done anything I can turn in, so this weekend I'll be doing that, and studying for the Control test Monday night. And today I'm determined to make stew and potato bread.