Epistemological, Methodological and Ontological Critiques of Theists on Naturalism

Graham Oppy, a contemporary Australian philosopher, is a naturalistic atheist who denies any supernatural causes. The problem of research is that; What are Oppy's principles in replacing naturalism instead of theism? The findings of the research, which were obtained with the analytical method of evidence, show that Oppy's epistemological, methodological and ontological foundations, based on which he considers naturalism more believable than theism, are not realistic and have fundamental challenges and slippages. In epistemology, his view of a successful argument faces many challenges; in methodology, he relies on the principle of simplicity, but by claiming the simplicity of naturalism against theism, he does not provide adequate answers to the many questions that are raised and does not resolve the theological philosophical problems about it. Ontologically, naturalism is not a substitute for God's supremacy, and the possibility of replacing naturalism with theism is very weak. Also, Oppy does not have a correct explanation of causality and has confused causality with the principle of determinism.