The "Inner Testimony" of the Holy Spirit

I forget whether I have posted this before. If so, pardon the redundancy.Having had on two occasions the privilege of debating Prof. William Lane Craig, I found the experiences both exhilarating and frustrating. One point of frustration was that Prof. Craig often appeals to the "inner testimony" of the Holy Spirit as trumping any evidence or argument that could be adduced. Naturally, this made