 MSA’s impact reverberates throughout the modal propositional base of Adams’ logic. Recall that the truth-in/truth-at distinction appeared to have restored the necessity of singular logical truths like Prior, if a logician, is a logician, \(\sfL\sfp \to \sfL\sfp\). The addition of MSA, however, leads quickly to necessitism, as it becomes possible to reason to Prior’s existence, \(\sfE!\sfp,\) without any instances of E!A: