DENIS proposed that the qualitative diophantine results known for certain subgroups of semi-abelian varieties should hold for Drinfeld modules. In particular, the Manin–Mumford conjecture which asserts that an irreducible subvariety of a semi-abelian variety containing a Zariski dense set of torsion points must itself be a translate of a subalgebraic group should be true with ‘‘semi-abelian variety’’replaced by ‘‘power of the additive group considered as an Fp½tŠ-module via a Drinfeld module.’’In [4], Denis permits finite extensions of Fp½tŠ but insists that the Drinfeld module have generic characteristic. The strengthening permits one to consider general Drinfeld modules while the restriction is necessary since every point of GağFalg p Ş is a torsion point for every Drinfeld module of finite characteristic. The analogue of Boxall’s theorem [1] may still be true for