>>dopamine isn’t a signal for prediction error at all, but a signal for unexpected sequences of events

How are those not the same thing? Isn't something unexpected because of a predictive error?

Guess I'd better go read Jeong et al's paper...
[edit]
Looked at the abstract: looks like they saw dopamine release when a desired outcome (in their example, a child receiving ice cream) with a previous event (in their example again, a bell heard earlier). So they're looking at look-back/discovery of novel cause /effect relationships. The abstract doesn’t mention how that makes a predictive model less likely.
>>... Between them, these first two papers were arguing there was much to dopamine beyond the error in predicting a reward.
Ah. OK - got it. :-)
[/edit]