Now, understanding a concept and grasping it to the point it becomes part of yourself are not the same thing. I don't expect people to remember the whole thing in less than an hour. Just to understand it, and being able to read supporting material without drowning.

A string is a sequence of characters, and "printable" is some arbitrary property. I would of course say as much in my real explanation.

Understand that my comment was just a sketch. I wonder If I shouldn't actually try to flesh it out. A video, maybe…