I know in the rule book have an example.
If check to defeat lists "check A or check B then check C"
you have to do either check A or check B, and then do check C.
Or an easier interpretation is
(check A or check B) then check C
In CotCT, we encounter another card.
checks to defeat are "check A then check B or check C"
In our game, we do check A first, and then choose another check from B or C.
Or can be read as
check A then (check B or check C)
Is it the right way?
If above examples are all correct.
Is there any card that requires you to either combat twice, or do diplomacy check?
(check A then check B) or check C
Would this card write in a different way?