Noretta Koertge is a philosopher of science noted for her work on Karl Popper and scientific rationality. She worked since 1981 as a Professor in the Department of History and Philosophy of Science and Indiana University and is now an Emeritus Professorship. Her notability is evident from her having been editor-and-chief of the journal (1999–2004) Philosophy of Science, her election as a Fellow, in 1999, by American Association for the Advancement of Science and her being Editor-in-Chief of The New Dictionary of Scientific Biography (2004–2008). She is also a novelist.[1][2][3][4]