Also known as moral intuitionism, this refers to the philosophical belief that there are objective moral truths in life and that human beings can understand these truths intuitively. In other words, what is right or wrong is considered by ethical intuitionists to be self-evident in nature and cannot be known through human experience. The idea was popularised by American philosopher Michael Huemer in his 2005 book Ethical Intuitionism. Critics of ethical intuitionism argue that people may come to different moral conclusions even after consulting their inner intuition. Others question whether people can arrive at moral conclusions at all using their intuition.