RT Article T1 Plantinga, hartshorne, and the ontological argument JF Sophia VO 20 IS 2 SP 12 OP 16 A1 Grim, Patrick LA English YR 1981 UL https://ixtheo.de/Record/1785584960 K1 Reduction Principle K1 Prima Facie Case K1 Central Premise K1 Ontological Argument K1 Contrary View DO 10.1007/BF02789922