Sure.
It goes on from there, but that’s a pretty good starting point: besides not warming, it would need to cool down to some point X – such that cooling down to some point A or B or C wouldn’t do it, even if it never again rose back up to where we are now.
(Keep reading that thread and he soon clarifies that even said drop to '70s levels would only falsify part of the theory; the whole thing would go out the window if even more cooling resulted, but he’s coy about exactly how much more – short of a second ice age – would suffice.)