Two things that puzzle me:
1) Why do video games have humanoid aliens? I understand why humanoid aliens are so common in television and movies--it's much cheaper to slap some makeup on a person than to have a quadraped with two mouths and tentacles. But video games should allow the creators' minds to run wild. Instead, developers seem to stick to the standard, boring biped (for intelligent aliens, anyway). Take Mass Effect, for example. Every screenshot I've seen from the game features humanoids. Some are skinny, some are thick, but they've all got two legs, two arms, and a head atop their shoulders, with two eyes and a mouth. Boring! One of the things I used to love about the Star Frontiers pen-and-paper RPG was the diversity of the aliens. It had eight-legged insectoid vrusk, ameoba-like dralasites, four-legged two-tongued Osakar, and the worm-like Sathar. It also had a couple non-human humanoids (Yazirians and Ifshnit, although I think everyone decided to ignore the Ifshnit), and the Humma, who looked sort of like kangaroos.
2) Why do doctors ask you to rate pain on a scale of one to ten? Don't they know interpersonal utility comparisons are very difficult? I had a kidney stone several years ago. When it started to cause pain I didn't know exactly what was going on, so I went to the hospital. The pain got worse and worse, and the doctor asked me "On a scale of one to ten, with ten being the worst pain imaginable, how much does it hurt?" I started to answer "ten", but then I thought it might hurt more if I had a kidney stone and someone was trying to saw my arm off. And that wouldn't hurt as much as a kidney stone, my arm being sawn off, and a heavy weight crushing my foot. How can I possible rate my pain from one to ten? Furthemore, is this scale linear? Is it logarithmic? Is ten twice as painful as five, or is it ten times as painful as nine?