Actually, when da Vinci wrote this resume, he wasn't well known. In fact, he'd done relatively little (did some commissions, worked in a workshop). The reason w

Actually, when da Vinci wrote this resume, he wasn't well known. In fact, he'd done relatively little (did some commissions, worked in a workshop). The reason why every single one of those points is 'I could' or 'I know how' is because he hasn't -yet-. Also, at the time da Vinci was applying (he was basically trying to get a gig as an engineer), it was expected that an engineer have a solid grasp of -all- of engineering at that time... which more or less was military engineering (seigecraft and defense), and civil (bridges and canals being the biggies).