  There, a simple explanation for how the ter'angreal works that contradicts nothing in the books and sticks to your ridiculous idea that a ter'angreal can only do one kind of thing.  Incidentally, I'm typing this out on a tablet, that is able to access the internet, while at the same time, send music to my bluetooth headphones, and also use its GPS radio to pinpoint my locations. It can also take pictures, record sound, allows me to play games, edit documents, and any number of other things.  