Spatial evolutionary game theory explains how cooperative traits can survive the intense competition in biological systems. If the spatial distribution allows cooperators to interact with each other frequently, the benefits of cooperation will outweigh the losses due to exploitation by selfish organisms. However, for a cooperative behavior to get established in a system, it needs to be found initially in a sufficiently large cluster to allow a high frequency of intracooperator interactions. Since mutations are rare events, this poses the question (...) of how cooperation can arise in a biological system in the first place. We present a simple model which captures two concepts from genetics that can explain how evolution overcomes the emergence problem. The first concept is, often in nature, a gene may not express its phenotype except under specific environmental conditions, rendering it to be a “silent” gene. The second key idea is that a neutral gene, one that does not harm or improve an organism’s survival chances, can still spread through a population if it is physically near to another gene that is positively selected. Through these two ideas, our model offers a possible solution to the fundamental problem of emergence of cooperation in biological systems. (shrink)

Positive frequency dependent selection is a natural selection regime where the fitness of a phenotype increases with its frequency in the population. Examples can be typically found in the spread of disease tolerance strategies in a population. A characterizing feature of PFDS is that the focal allele may experience favorable selection only when it becomes more frequent in the population, while being selected against when it is rare. In this paper, by applying a solution concept from evolutionary game theory, we (...) hypothesize that the process of emergence of such alleles triggers selection for silence, where the emergence of alleles that can stay unexpressed for a period of time will be favored by selection forces. We illustrate our hypothesis using a mathematical model of a population of single locus diploid organisms with two alleles where a single mutant of an allele that experiences positive frequency dependent selection appears in a population where the other allele is a dominant. The model results show that the longer the silence interval of the new mutant before its expression, the better its chances of getting fixed in the population. However, this effect will be observable only to a certain limit after which further increase in the interval will not have an effect on the expected fixation rate. Two divergences from the simple scenario are also investigated: the nonsynchronous expression of the focal allele and its emergence in a spatial grid limited by a migration bottleneck. In all cases, it is shown that there is an evolutionary pressure inherent in the dynamics of positive frequency dependent selection on the genes to have a delayed expression. It is hypothesized that the regulation systems of such traits will be under selection for either internal silencing mechanisms or to be triggered by an external environmental condition. (shrink)

Since Kit Fine presented his counter-examples to the standard versions of the modal view, many have been convinced that the standard versions of the modal view are not adequate. However, the scope of Fine's argument has not been fully appreciated. In this paper, I aim to carry Fine’s argument to its logical conclusion and argue that once we embrace the intuition underlying his counter-examples, we have to hold that properties obtained, totally or partially, by application of logical operations are not (...) essential to non-logical entities. I also demonstrate that most of the post-Finean versions of the modal view, which were developed to accommodate Fine’s counter-examples, entail that such properties are essential to the entities, and so fail to capture the notion of essence at issue in Fine's counter-examples. Additionally, I explore the consequence of my argument for Fine’s proposed logic of essence. The logic turns out to be inadequate in its present shape as it represents such properties to be essential to the entities. I conclude by developing a modification to the logic to overcome the shortcoming. (shrink)

Since Kit Fine published his famous counter-examples to the modal account of essence, numerous modalists have proposed to avoid the counter-examples by revising the modal account. A sophisticated revision has been put forward by Fabrice Correia. Drawing on themes from Prior’s modality, Correia has introduced a nonstandard conception of metaphysical modality and has proposed to analyze essence in its terms. He has claimed that the analysis is immune to Fine’s counter-examples. In this paper, I argue that there are counter-examples supported (...) by the very intuition underlying Fine’s counter-examples, which are not accommodated by Correia’s account. If my argument is sound, then Correia has not been successful in his defense of modalism. An important corollary of my argument will be that Fine’s consequential conception of essence needs to be modified if it is to capture his own intuitive notion of essence. (shrink)

One common objection against the Principle of Sufficient Reason is that it leads to a highly counterintuitive position, namely, necessitarianism. In this paper, drawing on Avicenna’s modal theory, I differentiate between two versions of necessitarianism: strong necessitarianism and weak necessitarianism. I argue that the modal intuition driving this objection pertains to strong necessitarianism, while the Principle of Sufficient Reason, at most, leads to weak necessitarianism.

The Muʿtazilī theologians, particularly the later Imāmī ones, developed numerous interesting arguments against divine command theory. The arguments, however, have not received the attention they deserve. Some of the arguments have been discussed in passing, and some have not been discussed at all. In this article, I aim to present and analyse the arguments. To that end, I first distinguish between different semantic, ontological, epistemological, and theological theses that were often conflated in the debate, and examine the logical relation among (...) them. Then I go over the Muʿtazila's arguments determining, among other things, which of the theses was targeted by each argument. In presenting the arguments, I focus mainly on the late kalām period, the period falling roughly between the thirteenth and fifteenth centuries of the common era, as the arguments were at their most sophisticated level by this time. (shrink)

Hale has argued that logical necessities are absolute in the sense that there is no competing kind of modality under which they may be false. In this paper, I argue that there are competing kinds of modality, which I call “essentialist modalities,” under which logical necessities may be false. Since it is counter-intuitive to say that logical necessities are not absolute, my argument, if correct, shows that Hale’s characterization of absolute necessity does not adequately capture the intuitive notion of absolute (...) necessity. Then, a qualified version of Hale’s characterization of absolute necessity is proposed. On the qualified version, the absoluteness of logical necessities is no longer defeated by essentialist possibilities. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:398 Feminist Studies 46, no. 2. © 2020 by Feminist Studies, Inc. Becky Thompson In the Slip Between Coasts Every morning the sea announces the day intimate crashing against the high stone wall we scan the waves for black dots floating becoming new moons and then arms waving rafts carrying the world Cartography in Greece after Zeina Hashem Beck’s “To Hamra” Here is the Oleander bush where a (...) family hid before their walk up the hill from Eftalou to Molyvos after eating eggs and croissants in my seaside room thirteen pairs of shoes lined up on the patio slate Here is seaweed beach where one raft landed in perched sea another behind carrying the elders and children Becky Thompson 399 stalled, taking in saltwater coast guard delayed in Petra sea ten, twenty, fifty minutes shouting and prayer finally a rescue exhaustion lining every pore They say memories fade, mine multiply, a cacophony tossing Here is the beach where the Syrian man strapping muscles and whimsical eyes gave me his salmon shirt with a finely made collar his friends ordered selfies called home saying yes began the climb to Mytilini defiant, alive There were moments of freedom jubilation in the air rest on the beach with dates and cool water children tossing stones into the sea lovers sitting close, feet in Europe cell phones that worked, telegraphing safety What does it mean to miss the intimacy of disaster? Now rescue teams mechanic pick-ups intercept rafts before shore whisk people away to Skala Sikamia then Moria no time to touch sand rest with the breeze Here is life jacket graveyard next to the dump perched between two hills above the seacoast 400 Becky Thompson a German couple toots up on a scooter taking photographs while eating nine-grain toast academics from the US talking postmodern flight a film crew from Barcelona picking through jackets amid ashes and twisted plastic crows memorize the wind as two garbage trucks trudge up the road bringing old fish and more jackets I wave at the sheepherder as I walk down the hill Save the people, bury the dead, photograph the remains, repeat Here is the hotel by the beach in Petra where children would run to the iron swing set let the arc carry them then jump off dance in the sprinklers the owner emerging mumbling generations handing us apricots and bottles of water Here is the computer store where the young Greek tells me he can’t copy my poems since he sees Arabic words menacing the page Here is my patience as I sit in his smoke ask him about his family and dancing Becky Thompson 401 eye his automatic weapon perched next to a wooden door Down the highway is a new bar next to Moria. Of course. Here is barbed wire that doubles as a fence a clothesline for diapers space to toss out rotten food Here is the highway lined with pickups and two-door sedans young Greek employment guarding people in tents Here is a baby carriage a young mother pushes that seconds as a grocery cart and shade for her five-year-old a step up from before when babies were in arms toddlers walking Here is the refugee people center where they built a strong swing set men lifting weights growing rings around their arms women stretching out in a new room eyeing the Lesvos sky Here are the streets of Mytilini looking like Beirut the Greeks who ran from Turkey the Turks who kicked out Afghans the Afghans who wish they were Syrian 402 Becky Thompson Syrians joined by Congolese— teachers, holy seers, and men selling hats. The sidewalk sparkles an atlas in transit.... (shrink)

이데올로기 문제, 상업주의적 평화사상, 인간의 소중 함을 피력한 저자의 글 모음.

A necessary prerequisite for application, to the humanities, of the techniques of contemporary logic, which have proven so effective in the formalization of the natural sciences, is explication of concepts, i.e., the setting up of unambiguous analogs permitting subsequent formal operations with these concepts within the confines of a clearly defined model. Today, the need for and the fruitfulness of modeling are obvious, and any explication meeting the requirements of unambiguity is therefore regarded as unquestionably a step forward. This is (...) entirely natural. (shrink)

В монографии рассматриваются мифы о Мировом Разуме, который нашими древними предками почитался как языческая богиня Матерь Мира София Премудрая. Для широкого круга читателей.

Human rights and civil rights, Interpretations and construction of Law and ethics, Iran.

The current major models of coexistence of species on the same resources are briefly summarized. It is then shown that analysis of supposedly competitive systems in terms of the physical four dimensions of phase-space is sufficient to understand the causes for coexistence and for competitive exclusion. Thus, the multiple dimensions of niche theory are reduced to factors which define the magnitudes of the phase-spatial system, in particular the boundaries of population spaces and of periods of activity. Excluding possible cooperative interaction (...) between consumers, it appears that coexistence of species on thesame kind of limiting resource is possible only in cases of compartmentalization either in space, or in time, of resource consumption, i.e. if each consumer species disposes of a separate resource supply. Three criteria were found to be decisive for successful compartmentalization (i.e. for coexistence): 1. the vector of the resource flow; 2. relative mobility between consumers and resource units; 3. dependence or independence of resource flow on previous consumption. The traditional terminology of niche theory and of competition theory in general proved to be inadequate for analytical treatment of problems of coexistence. (shrink)

Law -- Philosophy. ; Law -- Methodology. ; Hermeneutics.