ASpie inclusiveness/third options.

I was just reading a little from Autista http://aoskoli.blogspot.com/ about the inclusive thinking of MK. Son #2 (who has a fairly high ASpie score, although I'm still higher nyuk nyuk) does the equivalent (always has) in a different fashion:
Would you like a coke?
Maybe.
Would you like fried or boiled potatoes?
OK.
Would you like a coffee or a tea?
No.
And I can't think of an example offhand, but always there was the "third choice". Whatever the binary option presented, he would come up with a third unstated option. Sometimes a combination of the two choices offered, but usually a viable alternative that was totally un-thought-of.
OK, maybe this will give the idea...
Would you like fried or boiled potatoes?
Mashed.
Aaargh. Can be very exasperating when you don't actually have the third option available.