The author criticizes pear's use of the notion of material implication in his explanation of contrary-To-Fact conditionals. The author attempts to show that universal material implications "have no relevance to contrary-To-Fact conditionals." (staff).

The deepest beliefs’ about personal identity whose consequences Unger seeks to draw out are the beliefs of those who already share his theoretical convictions; and his pain-avoidance’ experiments show nothing unless one already assumes those convictions. If there is a risk’ that I may not survive a brain operation even though I know exactly which chunks of brain will be removed and replaced, that shows that I am a separate thing from my body and brain, about which the latter provide (...) normally reliable, but still fallible evidence. (shrink)