Why are (some) delta wings stable without a horizontal tail?

You know Jose, when you make a post like this to someone, you can go one of
two ways. You can stick a smilie on the end of it demonstrating the good
nature intended and make a friend, or you can just be a pedantic bore and
lose one. :-)

Smilie intended.

Jose
--
The price of freedom is... well... freedom.
for Email, make the obvious change in the address.