R.C. Sproul tells Greg Bahnsen the problems with Presuppositionalism

Here is an excerpt of a debate where R.C. Sproul explains to Greg Bahnsen the problem with the "certainty" of Presuppositionalism. The whole debate between is found here:    • Greg Bahnsen Debates R.C. Sproul (Presuppo...   Copyright Disclaimer under Section 107 of the copyright act 1976, allowance is made for fair use for purposes such as criticism, comment, news reporting, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favour of fair use.