How to change the rail horizontal offset. Warning: the next section will give you a headache. ** To change the plan offset of a rail is confusing: There is an instance property for each railing, but using instance properties for such global changes is a nightmare for inconsistency.
Simplex is a communications mode in which only one signal is transmitted, and it always goes in the same direction. The transmitter and the receiver operate on the same frequency.
The meaning is  simpleton . It's not that of fool as in  insane . This is confirmed by the main entry (there are no less than 5 for the common noun) in the OED: noddy, n. A fool, simpleton, noodle. Here are a few quotes (including your own quote).