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Biological development involves both ontogenetic and phylogenetic considerations. Thus, the development of specific traits, such as the opposable thumb in humans, can be viewed both from the point of view of the development of that trait in individual organisms (ontogeny) and the development of that trait in the human lineage (phylogeny). The development of knowledge and knowing mechanisms exhibits a parallel distinction. We can consider the growth of an individual's corpus of knowledge and epistemological norms or his or her brain (ontogeny) or... |
Evolutionary Epistemology is a naturalistic approach to epistemology, which emphasizes the importance of natural selection in two primary roles. In the first role, selection is the generator and maintainer of the reliability of our senses and cognitive mechanisms, as well as the “fit” between those mechanisms and the world. In the second role, trial and error learning and the evolution of scientific theories are construed as selection processes. |
In both perception and thinking, animal souls are in some ways active and in some ways passive. Although both mind and the sensory faculty receive their correlative forms when perceiving or thinking, neither is wholly passive in its defining activity. Perception involves discrimination, while thinking involves selective attending and abstraction, both activities, in the sense that each requires more than mere passive receptivity. Still, the sorts of activity required for cognition and perception do not explain in any obvious way another central... |
Aristotle describes mind (nous, often also rendered as “intellect” or “reason”) as “the part of the soul by which it knows and understands” (De Anima iii 4, 429a9–10; cf. iii 3, 428a5; iii 9, 432b26; iii 12, 434b3), thus characterizing it in broadly functional terms. It is plain that humans can know and understand things; indeed, Aristotle supposes that it is our very nature to desire knowledge and understanding (Metaphysics i 1, 980a21; De Anima ii 3, 414b18; iii 3, 429a6–8). In this way, just as the having of sensory... |
Aristotle devotes a great deal of attention to perception, discussing both the general faculty and the individual senses. In both cases, his discussions are cast in hylomorphic terms. Perception is the capacity of the soul which distinguishes animals from plants; indeed, having a perceptive faculty is definitive of being an animal (De Sensu 1, 436b10–12); every animal has at least touch, whereas most have the other sensory modalities as well (De Anima ii 2 413b4–7). In broad terms at least, animals must have perception if they are... |
Although willing to provide a common account of the soul in these general terms, Aristotle devotes most of his energy in De Anima to detailed investigations of the soul’s individual capacities or faculties, which he first lists as nutrition, perception, and mind, with perception receiving the lion’s share of attention. He later also introduces desire, evidently as a discrete faculty on par with those initially introduced. The broadest is nutrition, which is shared by all natural living organisms; animals have perception in addition; and... |
In applying his general hylomorphism to soul-body relations, Aristotle contends that the following general analogy obtains: |
In De Anima, Aristotle makes extensive use of technical terminology introduced and explained elsewhere in his writings. He claims, for example, using vocabulary derived from his physical and metaphysical theories, that the soul is a “first actuality of a natural organic body” (De Anima ii 1, 412b5–6), that it is a “substance as form of a natural body which has life in potentiality” (De Anima ii 1, 412a20–1) and, similarly, that it “is a first actuality of a natural body which has life in potentiality” (De Anima ii 1,... |
Aristotle (384–322 BC) was born in Macedon, in what is now northern Greece, but spent most of his adult life in Athens. His life in Athens divides into two periods, first as a member of Plato’s Academy (367–347) and later as director of his own school, the Lyceum (334–323). The intervening years were spent mainly in Assos and Lesbos, and briefly back in Macedon. His years away from Athens were predominantly taken up with biological research and writing. Judged on the basis of their content, Aristotle’s most important psychological writings probably... |
It is an undeniable fact, although nowadays rarely acknowledged, that the general outlook and the principal doctrines of the Neoplatonists proved exceedingly influential throughout the entire history of western philosophy. Through Augustine (354–430) in the West and the 4[size=12]th-century Cappadocian Fathers (Basil, Gregory of Nyssa, Gregory of Nazianzus) in the East as well as the pseudo-epigraphic writings of Dionysius the Areopagite (early 6th century), Neoplatonism profoundly... |
As human beings we are, with our bodies, part of the material world; but importantly, we are living organisms that can place ourselves in opposition to the needs and concerns of the body and reflect upon our own condition. Nothing just material would be able do that, according to the Neoplatonists, and therefore we have what the ancients called a “soul”. Moreover, our souls operate on a level of consciousness and intelligence that surpasses the cognition of all other creatures. Finally, just as everything else that has being, we are individual... |
Without light, it would not make any sense to speak of darkness. In fact, there would be no such thing as darkness, since darkness is, if it is anything, light’s absence and opposite. In the same way as darkness is a by-product of light, so matter, the Neoplatonists reasoned, is nothing but a by-product of the dynamic emanation of the First. In fact, it is the limit at which the energy transmitted in the chain of inner and outer activities at the various levels of reality exhausts itself and comes to an end. Just as darkness has no capacity to... |
According to the second law of thermodynamics, structural and dispositional diversities present in the inanimate material world converge towards irreversible entropy and disorder. In the biosphere, however, we witness a tendency to ever increasing diversification of natural kinds and species. From a Neoplatonic point of view, this latter fact is readily explained by the entirely non-Darwinian supposition of eternal Forms of natural kinds in the hypostasis of Consciousness which gradually emerge in the world, limited by space and time, in some sort... |
What was it that made the radically top-down idealism of the Neoplatonists so appealing? Disregarding in this context the religious-sentimental appeal Neoplatonism undoubtedly must have had and perhaps still has, its philosophical attractiveness and significance lies in the fact that it offered a maximum of explanatory power on the basis of just one metaphysical principle. Even though the system coheres in such a way that it is possible to approach it from many angles, it is perhaps best to begin at the top of the ontological pyramid and... |
The term “Neoplatonism” refers to a philosophical school of thought that first emerged and flourished in the Greco-Roman world of late antiquity, roughly from the time of the Roman Imperial Crisis to the Arab conquest, i.e., the middle of the 3[size=12]rd to the middle of the 7th century. In consequence of the demise of ancient materialist or corporealist thought such as Epicureanism and Stoicism, Neoplatonism became the dominant philosophical ideology of the period, offering a comprehensive... |
In Locke's Letter Concerning Toleration, he develops several lines of arguments that are intended to establish the proper spheres for religion and politics. His central claims are that government should not use force to try to bring people to the true religion and that religious societies are voluntary organizations that have no right to use coercive power over their own members or those outside their group. One recurring line of argument that Locke uses is explicitly religious. Locke argues that neither the example of Jesus nor the teaching... |
Locke claims that legitimate government is based on the idea of separation of powers. First and foremost of these is the legislative power. Locke describes the legislative power as supreme (Two Treatises 2.149) in having ultimate authority over “how the force for the commonwealth shall be employed” (2.143). The legislature is still bound by the law of nature and much of what it does is set down laws that further the goals of natural law and specify appropriate punishments for them (2.135). The executive power is then charged with enforcing... |
John Locke defined political power as “a Right of making Laws with Penalties of Death, and consequently all less Penalties” (Two Treatises 2.3). Locke’s theory of punishment is thus central to his view of politics and part of what he considered innovative about his political philosophy. But he also referred to his account of punishment as a “very strange doctrine” (2.9), presumably because it ran against the assumption that only political sovereigns could punish. Locke believed that punishment requires that there be a law, and since... |
The most direct reading of Locke's political philosophy finds the concept of consent playing a central role. His analysis begins with individuals in a state of nature where they are not subject to a common legitimate authority with the power to legislate or adjudicate disputes. From this natural state of freedom and independence, Locke stresses individual consent as the mechanism by which political societies are created and individuals join those societies. While there are of course some general obligations and rights that all people have from... |
Locke's treatment of property is generally thought to be among his most important contributions in political thought, but it is also one of the aspects of his thought that has been most heavily criticized. There are important debates over what exactly Locke was trying to accomplish with his theory. One interpretation, advanced by C.B. Macpherson, sees Locke as a defender of unrestricted capitalist accumulation. On Macpherson's interpretation, Locke is thought to have set three restrictions on the accumulation of property in the state of nature:... |
John Locke (1632–1704) is among the most influential political philosophers of the modern period. In the Two Treatises of Government, he defended the claim that men are by nature free and equal against claims that God had made all people naturally subject to a monarch. He argued that people have rights, such as the right to life, liberty, and property, that have a foundation independent of the laws of any particular society. Locke used the claim that men are naturally free and equal as part of the justification for understanding legitimate... |
Let us finally turn to nonmonotonic reasoning (for more information see the entry on non-monotonic logic). A premise [ltr][size=18]ββ[/ltr] classically entails a conclusion [ltr] γ,β⊢γγ,β⊢γ[/ltr], just in case [ltr] γγ[/ltr] is true in every model or truth value assignment in which [ltr] |
We have moved from degrees of belief to belief, and found ranking theory to provide a link between these two notions. While some philosophers (most probabilists, e.g. Jeffrey 1970) hold the view that degrees of belief are more basic than beliefs, others adopt the opposite view. This opposite view is generally adopted in traditional epistemology, which is mainly concerned with the notion of knowledge and its tripartite definition as justified true belief. Belief in this sense comes in three “degrees”: the ideal doxastic agent either believes [ltr][size=18]AA[/ltr],... |
Subjective probability theory as well as the theory of DS belief functions take the objects of belief to be propositions. Possibility theory does so only indirectly, although possibility measures on a field of propositions [ltr][size=18]AA[/ltr] can also be defined without recourse to a possibility distribution on the underlying set [ltr]WW[/ltr] of possibilities.[/size] A possibility [ltr][size=18]ww[/ltr] in [ltr] |
Possibility theory (Dubois & Prade 1988) is based on fuzzy set theory (Zadeh 1978). According to the latter theory, an element need not belong to a given set either completely or not at all, but may be a member of the set to a certain degree. For instance, Sophia may belong to the set of politically active people to a degree of .88. This is represented by a membership function [ltr][size=18]μ[size=13]A:W→[0,1][/size]μA:W→[0,1][/ltr], where [ltr]μ[size=13]A(w)[/size]μA(w)[/ltr] is... | |
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