 For discussions on the Appendix and the role of reason and systematicity, see Allison (2004), Brandt (1989), Buchdahl (1967), Britton (1978), Forster (2000), Friedman (1992), Ginsborg (1990), Grier (2001, forthcoming), Guyer (1990a, 1990b), Horstmann (1989), O’Neill (1992), Patricia Kitcher (1991), Philip Kitcher (1984), Nieman (1994), MacFarland (1970), Walker (1990), Walsh (1975), Wartenberg (1979, 1992), Rauscher (2010), Willaschek (2018).