My intuition is that double negation in English is usually accompanied by a shift in stress to emphasize that the negation should be interpreted in the "correct

My intuition is that double negation in English is usually accompanied by a shift in stress to emphasize that the negation should be interpreted in the "correct" way (i.e., as negating a previous negation) rather than as mere agreement. I think English actually allows multiple negation with no significant change in semantics in many dialects, possibly as the default interpretation. Be interesting to do a corpus study on this.