Pseudoscience is when untrue claims are made to appear as though they have a scientific basis, even though they do not. Many pseudoscientists cherry pick real scientific evidence to support their claims. It is quite common in science for some studies to contradict others, for example in cases where different methods are used to measure an outcome, or where human error or chance may lead to unusual results. This means that there is often a study someone can use to support their claim, and they can cherry pick that one study even if many more contradict it.