for them since they deny God. However, the Christian can challenge the non-Christian approach to interpreting human experience “only if he shows the non-Christian that even in his virtual negation of God, he is still really presupposing God.”18 He puts the point succinctly in saying: “Anti-theism presupposes theism.”19 The intellectual achievements of the unbeliever, as explained in The Defense of the Faith, are possible only because he is “borrowing, without recognizing it, the Christian ideas of