> normed division algebras are the reals,
> complexes numbers, quaternions, and octionions,
Can you see why I would not want to talk about quaternions and octionions in a chapter which is meant to introduce math to people who have math phobia?
> these are nested subsets of each other, not disjoint,
>
Everybody can see why you wouldn't want to do that, but there's no point in lying or, if you prefer, selectively informing. Complex numbers and quaternions will be equally mysterious to the true novice; there's nothing intrinsically scary about the words.
Can you see why I would not want to talk about quaternions and octionions in a chapter which is meant to introduce math to people who have math phobia?
> these are nested subsets of each other, not disjoint, >
This should have been more clear. Will fix.