Stamp effect means that when the research topic can be related to some specific things, activities and emotions, the accuracy of inference results will be greatly improved, the reasoning materials are specific, and the reasoning will be easier; Reasoning is more difficult when the material of reasoning is abstract
According to the definition of appeal, it is found that when sunspots are active frequently, bad weather will occur on the earth, so sunspots are considered to be a precursor of extreme weather doesn't belong to stamp effects.