The expanded Free Thinking Argument Against Naturalism adds steps from naturalism → no soul → no libertarian freedom → no rational inference (all deductive), plus abductive conclusion that God is best explanation.

Full argument: P1: If naturalism true → no immaterial soul. P2: If no soul → no libertarian freedom. P3: If no libertarian freedom → no ability to rationally infer/affirm knowledge. P4: Humans DO possess this ability. C5: Therefore humans have libertarian freedom (deductive). C6: Therefore human nature includes an immaterial soul (deductive). C7: Therefore naturalism is false (deductive). C8: The best explanation of human libertarian freedom and the soul is the biblical God (abductive — weaker than deductive but inference to best explanation). Steps 1-7 are deductive; step 8 is abductive and requires additional support.