Lance Rips describes a unified theory of natural deductive reasoning and fashions a working model of deduction, with strong experimental support, that is capable of playing a central role in mental life.

People living at the start of the third millennium enjoy a world that would have been inconceivable to our ancestors living in the 100 millennia that our species has existed. Ignorance and myth have given way to an extraordinarily detailed understanding of life, matter and the universe. Slavery, despotism, blood feuds and patriarchy have vanished from vast expanses of the planet, driven out by unprecedented concepts of universal human rights and the rule of law. Technology has shrunk the globe and (...) stretched our lives and our minds. (shrink)