To measure is to know, said Lord Kelvin. But as marketing departments get more and more creative with their published specifications, what we're left measuring—and by extension, knowing—about our gear is increasingly worthless.
"When you know a ratio, you don't know a recipe, you know 1,000." Ruhlman's upcoming Ratio iPhone app looks like an excellent way to spread his theory of ratio-based cookery. Scared of sauce-making or baking? This is for you.