The predominant approaches to understanding how quantum theory and General Relativity are related to each other implicitly assume that both theories use the same concept of mass. Given that despite great efforts such approaches have not yet produced a consistent falsifiable quantum theory of gravity, this paper entertains the possibility that the concepts of mass in the two theories are in fact distinct. It points out that if the concept of mass in quantum mechanics is defined such that it always (...) exists in a superposition and is not a gravitational source, then this sharply segregates the domains of quantum theory and of general relativity. This concept of mass violates the equivalence principle applied to active gravitational mass, but may still produce effects consistent with the equivalence principle when applied to passive gravitational mass (in agreement with observations) by the correspondence principle applied to a weak field in the appropriate limit. An experiment that successfully measures the gravity field of quantum objects in a superposition, and in particular of photons, would not only falsify this distinction but also constitute the first direct empirical test that gravity must in fact be described fundamentally by a quantum theory. (shrink)

Objectives: To explore individuals’ perception of the personal, family and societal educational needs following a spinal cord injury. Methods: Sixty-one patients who sustained a traumatic SCI between March 2015 and June 2016 referred to Brain and Spinal Cord Injury Research Center were included in a cross sectional study and completed an online survey containing open-and closed-ended questions, in Iran. Participants’ responses were analyzed i using a qualitative approach with a thematic analysis. Results: Following a thematic analysis of the patient’s perceived (...) educational needs, 3 themes and 14 subthemes were identified. The 3 themes included personal, family, and societal educational perceived needs. Within personal educational needs, there were 7 subthemes which included personal independence and transportation, financial independence, life skills modification, knowledge about SCI, prevention of SCI complications, relationships and sexual function, and psychological adjustments. Among family educational needs, the 3 subthemes were caregiver skills and communication, first aid and emergency skills, and emotional and psychological support. For societal educational needs, the 4 subthemes described were social integration, interpersonal communication skills, SCI awareness and injury prevention, sympathize while avoiding pity. Conclusion: According to our findings, people with SCI have various needs that need to be addressed. Educational support should be a part of a comprehensive rehabilitation program and geared towards addressing the patients’ personal and family needs, while educating the community about SCI in order to allow for reintegration into society. (shrink)

Sad al-Din Dashtaki, and following him, Mulla Sadra Shirazi maintains that all real compositions are unified. After a short review of Dashtaki’s thesis, we concentrate on Mulla Sadra’s version. Mulla Sadra believes that Dashtaki’s version is not coherent and he declines the existence of real parts. We will argue that Mulla Sadra’s objections do not work and furthermore, all things said and done there is no difference between these two versions of the thesis of unified composition. If there is (...) any difference, it is about their theory of existence, not about their theory of composition. Sad al-Din Dashtaki, and following him, Mulla Sadra Shirazi maintains that all real compositions are unified. After a short review of Dashtaki’s thesis, we concentrate on Mulla Sadra’s version. Mulla Sadra believes that Dashtaki’s version is not coherent and he declines the existence of real parts. We will argue that Mulla Sadra’s objections do not work and furthermore, all things said and done there is no difference between these two versions of the thesis of unified composition. If there is any difference, it is about their theory of existence, not about their theory of composition. (shrink)

The purpose of this article is to discuss Safavid period Islamic philosopher Sadraddin Shirazi’s philosophical methodology and the sources of the school founded by him. The article relies on research conducted on Shirazi philosophy. It shows that Shirazi through synthesizing the methods of the earlier schools that existed in Islam to acquire knowledge devised a new mechanism for acquiring knowledge. Before coming to Shirazi, intellectual movements formed during Islam’s classical period, such as peripateticism, illuminationism, theology and (...) Gnosticism, were of different views regarding the best way to reach the truth. For example, for peripatetics reason, for theologians revelation, for gnostics/mystics intuition or personal experience were important, but ishraqi school was somewhere between peripatetic and Gnostic schools. Sadraddin Shirazi, though, considered all these agents necessary, for they complement each other, and said they should be utilized altogether to obtain ultimate reality. Similarly, considering his philosophical sources, we see that he is influenced almost by all philosophical schools as well as religious sources. However, Ibn Sina and Ibn Arabi’s influence on him was more profound compared to other philosophers. (shrink)

The seventeenth century Muslim philosopher Muhammad Sadr al-Din Shirazi, known as Mulla Sadra, introduced the idea of substantial motion in Islamic philosophy. This view is characterized by a continuity criterion for diachronic identity, a four-dimensional view of individual substances, the notion that possibilities change, and the continual creation of all creatures. Modern philosophical logic provides means to model a variety of claims about individuals, substances, modality and time. In this paper, the semantics of formal systems discussed by Carnap, Bressan (...) and Gupta are reviewed with regard to the issue of substance and identity. Next a model introduced by Storrs McCall is described that is able to build upon and yet resolve some of the issues about substance and identity as characterized by Bressan and others. McCall’s model is also shown to be able to provide an illustration of Mulla Sadra’s doctrine of substantial motion. (shrink)

Sayyid Sadr al-din Mohammad Dashtaki Shirazi is the inventor of the division of composition into unified composition and composition by join. With this division, Dashtaki has expressed a new theory about the composition of the material object from first matter and form, as well as the composition of man from soul and body, and considers these compositions as an alliance and unification, not simply the parts joining to each other. In this paper, we will present Dashtaki’s arguments on the (...) theory of unified composition. We will also examine three objections to this theory and responses to them. Finally, we will examine the background of this theory in Bahmanyar's phrases. Dashtaki believes that when the components in the compound have a real plurality, i.e. each one exists separately from the other, a composition by join is created, such as the composition of a house from numerous clays. But if the components in the compound are united and none of them are separate from the others and exists actually, the resulting composition will be an alliance and union. He believes that in the unified composition, every component is identical to any other component and is identical to the whole. Accordingly, Reza is a unique being, both human and writer. In order to achieve a composition, a plurality is needed and in order to form a single composition, there must be plural components related to each other. An important question is that, principally how is a composition possible, if unified composition comes to existence only when the components are made united with each other and with the whole? In other words, unified composition is not possible, because the first condition of the acquisition of the composition, i.e., the plurality of the constituent components, is not satisfied. Dashtaki strives to express a difference between the components in the union compound. He believes that the conditions of the realization and the survival of the components are different, and that is enough for them to be different. In Dashtaki's point of view, in the unified composition the components are analytical, not being separate and plural, in reality. In other words, the components do not have actual and "in-the-world" plurality, which means that it is our intellect that separates them and looks at them as independent objects. Therefore, unity and identity are in-the-world and plurality and discernibility are analytical and in the mind. Dashtaki's first argument for his theory in general is as follows: the three major material objects (solid, plant and animal) are undoubtedly real compounds. But in these compositions, components exist potentially, and in a unified composition, components do not exist actually. Therefore, these objects are unified compounds. The second argument is that the accuracy of predication implies unity. In the unified composition, the components are identical with the whole, and therefore, the components can be predicated to the composition. In Dashtaki's view, if A is predicated to B, then it could be concluded that they are identical and unified. The first objection to this theory is that the unity is incompatible with causality. From the perspective of the Peripatetics, form is the cause of the matter, and this is incompatible with the union of the two. Dashtaki states that in case of causality, there is no need for cause and effect to be two different and discernible entities, but a single entity may be from one aspect the cause and, from another, the effect. In other words, the foresaid causality is analytical causality. When mind analyses something, and then finds analytical components, it can see between those analytical and intellectual components, causality, and find some of them as the cause of the others. The second objection is the incorrectness of the unity in compounds with components not being similar. only in the compounds having similar parts, one can accept the unity of matter and form. For example, in compounds such as horses, it is not possible to accept the union of matter and form, because in horses, there are components with different natures, such as bones, flesh and nerves. Unity of These parts with each other and with the whole is not plausible. Dashtaki’s respond is that the horse is also a natural unit and has no actual plurality. Components having similar or different natures does not make any difference. According to the theory of unified composition, the horse's components are united with the horse's form and have only analytical plurality. Horse’s components are just analytical components, not actual, independent ones. The third objection is the incompatibility of the actual existence of components with their unity. But Dashtaki maintains that a unique actual personal entity cannot have actual plural components. He states that compounds such as horses exist objectively, but objective and real existing is divided into two kinds: dependent existence, and independent existence as a single real thing. Therefore, the two characteristics of "being a component" and "being independent" are incompatible and do not come together in a real being. Dashtaki has also quoted phrases from Bahmanyar to confirm his point of view. Bahmanyar says that the properties of an animal belong to the whole and compound, not to each component. For example, it is a horse that feels, not its bone or brain, as the eye is also a compound, but seeing is the work of the eye, not the work of any of its components. Therefore, the animal, which is something compound, has characteristics that none of its components have. So the animal is something over and above its components. Bahmanyar thinks the components in the animal are potential. Then he states a general rule: any compound in which unity is real, its components do potentially exist. Therefore, Bahmanyar considers the body parts of the living organism as a potential being and generally believes that the components of any compound that have true unity are potential. The potentiality of the components in a real compound does not that mean that the components are destroyed and a new thing is produced. The components are also available, but they do not have the effects they had separately before the composition comes into existence. In other words, the components have found a unique identity together and therefore have a new effect.. It seems that Bahmanyar has expressed the same idea that Dashtaki is looking for in the theory of unified composition. Therefore, it can be said that before Dashtaki, Bahmanyar has come up with the thought of a unity. Of course, Bahmanyar has not explained much about this, and Dashtaki is the first who has organized and completed this idea as a philosophical theory. (shrink)

Sadr al-Din Muhammad b. Ibrahim b. Yahya Qawami Shirazi (ca. 1571–1636), known as Mulla Sadra, is one of the three important philosophers (with Avicenna, and Suhrawardi) in Islamic philosophy, after the period of the first prominent Islamic philosophers i.e., Averroes and al-Farabi.

Sadr al-Din Muhammad b. Ibrahim b. Yahya Qawami Shirazi (ca. 1571–1636), known as Mulla Sadra, is one of the three important philosophers (with Avicenna, and Suhrawardi) in Islamic philosophy, after the period of the first prominent Islamic philosophers i.e., Averroes and al-Farabi.

Sadr al-Din Muhammad b. Ibrahim b. Yahya Qawami Shirazi (ca. 1571–1636), known as Mulla Sadra, is one of the three important philosophers (with Avicenna, and Suhrawardi) in Islamic philosophy, after the period of the first prominent Islamic philosophers i.e., Averroes and al-Farabi.

Sadr al-Din Muhammad b. Ibrahim b. Yahya Qawami Shirazi (ca. 1571–1636), known as Mulla Sadra, is one of the three important philosophers (with Avicenna, and Suhrawardi) in Islamic philosophy, after the period of the first prominent Islamic philosophers i.e., Averroes and al-Farabi.