Most of my credit cards are extremely hard to read - the numbers are metallic and reflective or the same color as the background. However, I just used my iPhone 5 camera to view some of the cards. Amazingly much of the data can be read - although the shiny letters on the Amex make my name pretty hard to read. Maybe the camera will have a special mode when scanning cards? High contrast maybe?
This is definitely true and becoming more so as things swing to the extreme right. In Texas the wing nuts spend a lot of time trying to dumb down the education system. http://www.therevisionariesmovie.com
I don't think Apple has any desire to give users the tools to abuse the battery and cause early failure. The system is very carefully designed to manage the battery itself under a wide range of conditions and use. Giving you the ability to interfere with that would simply increase warranty claims to Apple for bad batteries.
The example I found for that definition was: "a turgid and fast-moving river"synonyms: swollen, distended, tumescent, engorged, bloated, tumid More So it can be used to describe water, but as I said earlier, it's an ugly word for such pretty water.