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Søren Kierkegaard, the prominent Danish philosopher, faced criticism from Mario Bunge, a renowned Argentine-Canadian physicist, philosopher, and systems theorist. Bunge held reservations regarding the philosophical approach of existentialists like Kierkegaard, questioning the lack of scientific rigor and empirical grounding in their theories. He believed that their focus on subjective experience and individual existence disregarded the objective analysis and systematic inquiry necessary for a comprehensive understanding of reality.