It's not an example of evaluation order because we weren't discussing evaluation order. GP said: > If objects are mutable then the order of execution matters,

It's not an example of evaluation order because we weren't discussing evaluation order. GP said: > If objects are mutable then the order of execution matters, and you have to trust the programmer to get the data flow and control flow to agree Which is true both for OOP and FP, unless I misunderstood what GP meant with data and control flow.