I'm an aerospace engineer by trade and play at being a lot of other things: a philosopher and semanticist by upbringing, and a historian, cosmologist, writer, sociologist, biologist, anthropologist, and artist by interest. I'm not saying I'm really any good at any of those (except for the engineering, which I pride myself on, and maybe the philosophy, which I've practiced for some time), though others might through either honest appraisal or an excess of kindness.