Complex sentence: The first grew out of his earlier argument in "God and Other Minds" (1967) There, Plantinga argued that if our belief in other minds is rational without propositional or physical evidence, then belief in God is also rational.
Split into simpler sentences: The first grew out of his earlier argument in "God and Other Minds" (1967). In that work Plantinga argued that if our belief in other minds is rational without propositional or physical evidence, then belief in God is also rational.