Justin chairs an open ended conversation between two Scots. Church leader David Robertson and atheist Tony Smollett.
They cover the reasons why Tony fell away from his churchgoing childhood and would find it difficult to become a Christian today, while David shares from his own journey to faith.
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For Tony Smollett: https://twitter.com/tonescotland
For more faith debates visit www.premierchristianradio.com/unbelievable