Many concepts in research and science are poorly understood, wrongly applied or simply misinterpreted. Paul Feyerabend's book title "Against Method", for example, is provocative, but highly misleading. Adam Smith is mostly known for the "invisible hand", which can be used for justifying any kind of laissez faire capitalism, but this does not do justice to his book "Wealth of Nations". Furthermore, I claim that Popper's falsification principle is frequently misunderstood in the social sciences. What about Cronbach's Alpha as an indicator for measuring reliability? Any further examples and/or opinions?