Shapes of the Person-Case Constraint: Gluttony, conflicts, and licensing of person

These remarks discuss certain properties of the Person Case Constraint (PCC) in relationship to other person-hierarchic argument interactions, and to other person-sensitive gaps in clitics and agreement. They address recent proposals of considerable theoretical interest: multiple Agree in lieu of rather than combined with interpretable person licensing, with consequences for conditions on matching by nontrivial phi-probes (section 1, drawing on cyclic agreement and indirective-secundative alignments); agreement conflicts versus person-licensing failures, and ways to escape them (section 2, on nonagreeing clauses and on portmanteaus); clitic clusters as constitutive of the PCC (section 3, on extensions of the PCC in systems with chiefly the clitic-cluster PCC); and variants of the PCC as parametrisations of Agree versus invariant Agree plus mechanisms specific to pronouns or their clusters (section 4, on distribution, systematicity, and repairability of the strong versus weak PCC). The discussion aims to bring out domains that motivate or challenge particular proposals, ways of meeting the challenges, and their commitments. The remarks are framed in part as a commentary on Coon and Keine (2019) [C&K], beginning with its development of and departures from Béjar and Rezac (2009) [B&R], and avail themselves of C&K's synthesis to address elements of recent syntactic analyses of the PCC, including Stegovec (2019); Preminger (2011, 2014, 2019); Anagnostopoulou (2005, 2017); Nevins (2007, 2011); Baker (2008, 2011); Béjar (2011); Rezac (2011); Sheehan (2019)