Scientists have to give arguments all the time - in their publications as well as in conferences and lab meetings. Nevertheless, the bases for strong and correct arguments are not always fully clear to them. Logic provides extremely helpful tools for scientists to develop their arguments in a coherent well-structured and convincing way. The seminar gives an introduction to the most important concepts of logic: premises and conclusions of arguments, validity and soundness of arguments, deductive vs. inductive reasoning, common types of inferences and fallacies. The idea of the workshop is to use the concepts as a toolbox which provides very useful techniques for everyday scientific work.