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
Galileo dropped two iron balls with different weights from the same height at the same time on the Leaning Tower of Pisa, and the two iron balls landed at the same time, which confirmed that the speed of free fall had nothing to do with mass doesn't belong to stamp effects according to the definition of appeal.