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For example, if you have 3 types called T, where t1 and t2 are defined
but t3 isn't, then you will have
unspecifiedtype(t1, t1)
unspecifiedtype(t2, t2)
unspecifiedtype(t3, t3)
t1 = resolve(t1)
t1 = resolve(t3)
t2 = resolve(t2)
t2 = resolve(t3)
so given
Type getUnspecifiedType() {
unspecifiedtype(unresolve(this), unresolve(result))
}
you get t1.getUnspecifiedType() = t2.
I think that in general the best thing to do is to not unresolve 'this',
but to just take the underlying value.
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