Welcome Mike!
Even though the various sentences might not make too much sense, it is my understanding that that are used, through a formula, and selected according to a number of weighing factors like context, noun, verb, adjective, etc., and are a large source for Hal's knowledge base.
I have noticed the save feature being grayed out on my paid version but in the past, if I have made changes, the program will ask me if I wish to save when I attempt to quit.
Might have been overlooked during finalization of the program.
Any thoughts Robert?