Re. (21): Add "Tree for (20b)" next to "(21)."
Re. (23): Add "Tree for (22b)" next to "(23)."
Re. the line right before (24): The necessary conditions for ... ==> Among the necessary conditions for ...
Re. (30): The c-command relation between ... ==> The c-command relation (and the lack thereof) between ...
Re. the paragraph right before (34): ... the negative prediction in (31) would be ... ==> ... the negative prediction in (31), and hence in (32), would be ... |