On logic

First, the author considers the postulates he made about preference relations on acts to have both an empirical interpretation - as a 'prediction about the behavior of people' - and a normative one - as a 'logic-like criterion of consistency'.

Then some discussion of the role of logic in general:

...logic itself admits an empirical as well as a normative interpretation...to summarize (the empirical interpretation), logic can be interpreted as a crude (since people make mistakes and have limited computing power) but sometimes handy empirical psychological theory...(not very successful though)

...the principle value of logic, however, is in connection with its normative interpretation...as a set of criteria by which to detect, with sufficient trouble, any inconsistencies there may be among our beliefs...

'not appropriate' here to discuss 'why and in what contexts we wish to be consistent'. We simply 'often do wish to be so'.