Wilder Penfield’s conversion from ardent “strident materialist” to “passionate dualist” was a result of the scientific brain research he performed in his work as a neurosurgeon. Michael Egnor explains it all here. Egnor further notes that there is an even more compelling case for dualism based on a philosophical and logic arguments that dovetail nicely with the scientific ones. The article is well worth the read. He makes this statement at the end of the article.

The denial of free will is an ideological bias, not a credible scientific or philosophical conclusion.