Today’s Dividing Line (DL) program will be posted soon, I’m sure. In the meantime, since the issue came up in passing during the DL, and since you have some time to kill while you are waiting for the mp3 of the DL to become available, you can check out a response I wrote a couple of years ago to William Lane Craig on the issue of the Grounding Objection (link).
Alpha and Omega Ministries is a Christian apologetics organization based in Phoenix, Arizona. James White, director, is a professor, having taught Greek, Systematic Theology, and various topics in the field of apologetics for numerous schools.