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Reading the introduction to a Little Exercise for Young Theologian by Thielicke. The introduction is written by well-known church historian Martin Marty. He says Thielicke was born in 1906. The article says 1908. I won't make an edit since I don't know enough, but here's my source and invite a more familiar editor to check it out.  btw - tried to include direct link to pdf I found via google, but wikipedia says the site was blacklisted and wouldn't let me save it, so you'd have to find it yourself