0] - points_for_approximation[j][0]) < 2.0
			&& Math.abs(points_for_approximation[i][1] - points_for_approximation[j][1]) < 2.0)
				show("fact_3");
	}
	if(is_shown("fact_1") && is_shown("fact_2") && is_shown("fact_3"))
		show_approximation_facts();
}
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