Open and closed lists
As we have seen, a leading non-fall at the beginning of an utterance leaves us waiting for the fall that will complete the pattern. It thus indicates that the sentence is incomplete. It signals non-finality. Put it another way, a non-fall leaves matters open.
A fall, on the other hand, indicates that the sentence is potentially complete. It tends to signal finality. It suggests that matters are closed.
We see the distinction between the closed fall (= definitive fall) and the open non-fall (= non-final fall-rise or rise) most clearly in the intonation lists:
(iv) ⤴Chicken | or ⤴beef?
(vi) We've been to ⤴Manchester, | Edinburgh | and ⤵London.
Although the intonation patterns in these examples are valid, they are not the only way of treating lists. First, we do not have to give each item its own IP: openness of a list can be signalled simply by not yet having reached the nucleus, i.e . by giving the non-final items head accents rather than nuclear accents:
You can have ▸coffee or ⤴tea
▸Chicken or ⤵beef?
▸Chicken or ⤴beef?
▸One, ▸two, ▸three, ▸four, ⤵five.
We've been to ▸Manchester, ▸Edinburgh and ⤵London.
Alternative questions are sets on two or more yes-no questions linked by or. They are treated as lists. A closed list ends in a definitive fall, and in principle an open list (if nuclear) ends in a dependent rise. However, the speaker has some discretion to ignore this rule.
Is that a ⤴gun in your pocket? | Or are you ▸just pleased to ⤵see me?
Is it a ⤴bird? Is it a ⤴plane? (|| ⤵No, | it's ⤵Superman!)
Am I asking ⤴fifty dollars? Or ⤴forty dollars? || ⤵No, it's ▸yours for ⤵twenty!