 Second, there are logical cases, grounding claims that correspond to certain logical inference rules, particularly introduction rules (cf. McSweeney 2020 and Merlo 2020). Just which introduction rules are relevant here will depend, in part, upon whether grounding is worldly in nature (see  §2.1  for discussion). The conjunctive case concerning the bowl being brittle and the truckers striking above is such a case, which of course corresponds to conjunction introduction. For other examples, consider the following two cases, which correspond to disjunction and existential introduction, respectively: