In the literature, essence is formalized in two different ways, either de dicto, or de re. Following [11], we adopt its de dicto formalization: a formula is essential, if once it is true, it is necessarily true; otherwise, it is accidental. In this article, we study the model theory and axiomatization of the logic of essence and accident, i.e. the logic with essence operator (or accident operat...

conclusions using ginger essence was effective in reducing nausea and vomiting not only in the subjects who underwent open nephrectomy but also in the subjects of laparoscopic nephrectomy. using ginger essence is suggested as a complementary remedy to prevent and treat post-operative nausea and vomiting in patients with nephrectomy. background some studies reported that ginger was effective in ...

 In what follows, the author has dealt with the relation between the necessary being as an unchangeable Essence and His changeable and unchangeable attributes. Neither is the ascription of any changeable attribute impossible for God nor is the ascription of any kind of unchangeable attribute possible. As the change of genitive attributes does not demand the change in the Essence, it is possible...