If being superstitious is believing in things that
aren't
true, being substitious is believing in things that are
true, but that very few people believe to be true.
There are many substitions, which include "It'll get better if you don'
t pick at it," "Sometimes things just happen," and "There are a lot of things in the
world that you don't know about."
Terry Pratchett describes
71-Hour Ahmed as substitious, which "places him in a minority amongst
humans."
— Taken from the page everything2.com/title/substition, explaining substition according to Terry Pratchett, who originated the term in the Discworld novel Jingo.