Well then. Will the naysayers please leave the universe? - Charles Stross

Vampires can’t exist. There’d be detailed records in the archives; they couldn’t possibly evade detection by the state for any significant period. Besides which...there’d be corpses everywhere. Human blood is a poor nutrient source; it’s about 60 percent plasma by volume and only provides about 900 calories per liter, so your hypothetical blood-sucking fiend is going to have to drink about two and a half liters per day. Those calories don’t come in the form of useful stuff like glucose and fat: it’s mostly protein from circulating red blood cells. Dracula would have to exsanguinate a victim every day just to stay alive, and would suffer from chronic ketoacidosis. The total number of intentional homicides for the whole country is around 700 a year; a single vampire would cause a 50 percent spike in the murder rate. Or they’d have to take transfusion-sized donations about two thousand times a year.

It's top of the range." She pats the other side of the rack, as if to make sure it's still there: "This baby's got sixteen embedded blade servers from HP running the latest from Microsoft Federal Systems division and supporting a TLA Enterprise Non-Stop Transactional Intelligence™ middle-ware cluster‡ connected to the corporate extranet via a leased Intelsat pipe."

We’re up the highway from Colorado Springs. The holy rollers are big in Colorado. Mostly they’re harmless, ’long as you’re not a young woman in search of an abortion.