But in any subject that was based on fixed rules, like math or chemistry and physics, my grades tanked. I can remember the exasperated look on my mother's face at report card time as I'd try to explain this to her. “These are absolutes, Mom. They're boring. Take math, two plus two equals four, I mean, that's already on the books, right? Somebody's already nailed that down. So what do they need me for?” Mom would sigh and make sure to sign the report card before Dad got home from work.