If you are a little bit confused or have read something
else (we have found some misleading information on our
research for this grammar).
1) the conjunctive I is exclusively
used for reported speech. It does not have any other
function!
2) the conjunctive II appears in the reported speech
under a.m. conditions.
There is no difference in the meaning between conjunctive
I and II.
Example:
Er
sagt, er gehe in die Schule. (conjunctive
I)
Er sagt, er
ginge in die Schule. (conjunctive
II)
Both sentences mean
the same. The fact that conjunctive II is used even
if the conjunctive I is not ambiguous is only related
to the fact that the living language is not rule based
anymore - be it that the speaker does not know the rule