All constraints mentioned above put together, pseudogapping in coordination structure can be described as follows; (32) contains the new constraint 'R 2' → R 2'' ' which indicates R 2'' can be remnant only when R 2' is remnant.
this prevents (27b) -AP is a unique remnant -from being predicted grammatical and allows (27a) to be judged as grammatical sentence, even though it sounds awkward.