- the imaginary: the idea of using a theory in "mathematical psychology" that is derived in the complex field to solve physical problems in the real world would appear to be a sort of sardonic joke about the actual usefulness of "applied psychology". see, hard science nerds don't tend to take psychology very seriously, so the lark lies in the idea of using the complex (or "imaginary") field to build the theory, and is actually a rather heavy-handed joke, if you're a hard science nerd. it's not that deep, but it's actually a decent work of comedy - and i can only once again wish it was longer. but, to be honest, it sort of seems like what asimov is doing here is just aimlessly making up dialogue with big words to sell to a magazine, strictly for the cash. so, decent joke aside, this is more throwaway, although i also realize that the plot for the foundation series is starting to develop, here, out of the joke.