G. E. Moore was a prominent philosopher in the 20th century whose work focused on ethics, epistemology, and ontology. Synonyms for the name "G. E. Moore" include George Edward Moore, Moore, and Sir George Edward Moore. His philosophical contributions include the open-question argument, which challenges the idea that moral terms can be reduced to non-moral terms, and the naturalistic fallacy, which argues against defining good in terms of natural properties. Moore was also a founding member of the Bloomsbury Group, a literary and artistic movement in England. His contributions to philosophy have had a significant impact on the field and continue to be studied and debated today.