In the scientific community, we hope that there is no Existence presuppositionin the argument  The so-called existence presupposition is to presuppose the subject's existence in a proposition  For example, in the proposition that Sun Wukong has a good eye, the existence of Sun Wukong is not presupposed, but in the proposition that some flowers are red, the existence of flowers must be presupposed  A Newton's First Law of motion, which determines that a body which is not subject to any external force must remain at rest or in uniform motion in a straight line
This law may be true, but when physicists express it and determine it, they do not presuppose the existence of an object that is not subject to any external force
The existence presupposition depends on whether the subject really exists or not.