was + will = is

The positions of philosophy of time may be divided in three main waves:

1) Presentists believe that only present is real. Past exists only in present memories and future in present predictions (this is the intuitive feeling, but it is not valid under the theory of relativity).
2) Eternalists believe that all three points in time to exist together (past, present and future. Relativity would be eternalist).
3) Growing block theoreticians believe that only past and present are real.

These sum up the discussions about the ontological status of time (or space-time) in physics. I will not try to add to it here. My concern will be the anthropocentric (maybe extensible to most animals) experience of time. The claim will be that 'present' does not exist (in experience).

The nonexistence of present as a human experience is a perplexing idea because under the commonsensical presentist view present is all there is. Watch out Carpe Dienists!

Let us sum up the facts about our perception to reach the result. In an experiment Eagleman& Sejnowski asked people to press a button to light a light bulb. When the interval between these actions was 80 miliseconds people said the light turned on immediately. When this interval was reduced to 40 miliseconds they said the light turned on before they had pressed the button. This happened because there is an 80 miliseconds delay between what we see and when the brain realizes that we have saw. Therefore, when we 'realize what we see' we are seeing 80 miliseconds in the past. Our 'present' experience is of the past. Past presents itself to our subjective experience.

Although, specially in a more natural context of human survival in the wild habitats this difference in milliseconds may be the difference between life and death. To survive one must anticipate predators. If the eyes perceive (limbic system in the brain) the present but the brain takes milliseconds to figure it out (occiptal lobe), brain would be a disadvantage and we would not have evolved to spend so much energy in using it. The caveat lies in the future. The brain may takes some milliseconds but it is not trying to 'perceive' the present (or past as we saw) but to 'anticipate' the future. Kwon,Tadin & Knill invite us to think about when someone throws a ball and we easily pick it. If we acted in the present it would have been too late to pick it. You have to anticipate its trajectory and move your arms where the ball will be a few milliseconds in advance.

If the crossing of information above makes sense we interpret the future out of the past to act as if we were in the present. The casual steps are due to past and future: I saw X at the position p1 moving in time t1 X will be at p2 at t2. Thus past and future are the building blocks of our present experience and the present for us exists only as a supervenient result. Our experience of the present is just another useful illusion which uses past data and future prediction to compose a 'simultaneous experience' of the world.

In sum

We see 80 milliseconds in the past (Eagleman & Seinowski)
We project it in the future (Kwon, Tadin and Knill)
[For it to be worth we have to procees it accurately 80 + (at least) 1 in the future]
Therefore we use the past to project the future (this is what we call 'present')
[The present is properly present only in the cases where the situation is static for at least 80 + 1 milliseconds in the future, so that what we saw in the past and what we project into the future remain the same.]

The next time someone advices you to enjoy the momentum you can answer that one cannot truly experience the present. You might at most commit yourself to use the past data in a useful way to predict a pleasant future. Carpe crastinun the saying should go.


E se Descartes tivesse Facebook?


Você vai ler a seguir a proposta de um ceticismo útil para o modo como a gente troca informação hoje em dia (2015). Não espere nada profundo, é apenas uma sugestão rasa como a tela de um tablet (mas que suporta imagem em 3D). Professores são aconselhados a não começar uma aula anunciando a lição de casa. Se o fizerem, dizem os manuais (que são os professores dos professores), os alunos ficarão pensando na lição e não prestarão atenção na aula. Vou começar pela lição, já que, nesse caso, o intuito é justamente que o leitor fique pensando nela.

Comece a contar quantas vezes você concorda com uma informação (notícia, postagem, propaganda, pesquisa e etc) logo após ter lido o título. Se eu tivesse que apostar, apostaria que isso acontece na maioria das vezes. Isso é um problema. É um sinal de que não estamos procurando informação, estamos procurando confirmação (e seus irmãos: o consolo, o apoio, um abraço e até um carinho). Vamos pensar na felicidade (eu já sabia!) do vegetariano quando lê um título do tipo: 'Bacon faz mal à pele'.  A inversão tende a ser simétrica. Pense em quantas vezes você já lê aquele texto contrário à sua posição política fazendo um comentário cético-irônico a cada sentença. Vamos admitir: nosso rigor, assim como nosso humor, é partidário. Um carnívoro, diante da mesma notícia, emenda: 'é claro que faz mal para a pele: a do porco.' Os dois processos, confirmação e negação cegas, funcionam para nos deixar feliz. Se seguirmos assim, nada abalará a visão de mundo que nos sustenta. Ainda assim, saindo da auto-ajuda, talvez esse não seja o melhor uso que se possa fazer do ceticismo.

Descartes ficou célebre por começar sua investigação pelo ceticismo. Não foi uma inovação dele, eram tempos tortuosos aqueles em que descobertas científicas (Copérnico, depois Galileu e a terra já não é o centro do universo!) abalavam os pilares do conhecimento. Não se assuste com as três referências em uma sentença, isso é tudo que eu sei sobre essas três celebridades e você não precisa de mais nada para entender o ponto. O ponto é que Descartes não aplicou o ceticismo aos seus rivais. Ele não foi rigoroso ou crítico com quem ele discordava. Muito pelo contrário, ele começou aplicando o ceticismo às suas próprias crenças. Hoje é fácil dizer que não deu muito certo, já que ele falou algumas coisas que hoje soam como bobagens (talvez seja porque ele não aplicou o ceticismo tão afundo como apregoava). Mas enfim, o que se extrai desse exemplo é que o ceticismo é uma arma que funciona melhor se utilizada contra nós mesmos. O movimento não é natural. Nada é mais artificial do que discordar de nós mesmos. A gente acha, acha não, a gente tem certeza de que sabe a verdade. E mais, quão estúpidos são aqueles que não percebem que nós estamos certos! Talvez essa certeza cega tenha uma explicação evolutiva. Quem não para para se questionar age mais e não hesita em ir até o fim. Em um contexto de luta pela sobrevivência isso pode ser vantajoso. Mas para buscar informações sobre o mundo é preciso abandonar essa natureza. Se você quer informação em vez de confirmação, comece duvidando de si. 

Isso dito, diante de uma notícia com a qual concordamos desde a leitura do título teremos duas opções razoáveis. a) Não ler, ou b) ler forjando um ceticismo. É claro que sempre se pode ler algo dauqele amigo, daquele comediante ou daquele jornalista com o qual sempre concordamos apenas para satisfazer aquela dose diária de confirmação das nossas certezas. Mas cuidado, é preciso fazer isso sabendo que é tão arriscado alimentar certezas quanto gremlins. Quem não gostou do título (ou quem gostou da sugestão) e está lendo esse texto em busca de problemas, com certeza já aventou para o problema que os não-céticos logo identificam no ceticismo: ele não pode ser aplicado a si mesmo. Pois se assim o fosse, o leitor deveria ser cético diante desse texto que aconselha a ser cético. A conclusão, nesse caso, seria que o cético, então, não deveria ser cético!?

Não necessariamente. Se o ceticismo é definido como uma arma a ser aplicada contra si mesmo, aqueles que discordam desse texto deviam questionar-se porque discordam. Apenas os céticos deveriam questionar seu não ceticismo diante desse texto, o que seria muito saudável. Desse ponto de vista, o ceticismo seria como o bumerangue que volta contra quem o lançou, mas, para quem sabe lançar, a volta é, na verdade, um benefício e não um problema. É possível ser cético (principalmente contra nossas certezas) sem ser nihilista. Como Descartes, vamos usar como um primeiro passo para continuar se informando. Uma vez ao dia, deixe de ler um artigo com o qual já concorda com o título e busque um da opinião contrária. Mas cuidado com essa busca. Não escolha a dedo o pior defensor da opinião contrária para justificar sua oposição. Procure bons oponentes, neles a gente pode encontrar amigos. Por exemplo, eu jamais irira concordar com as limitações da teoria evolutiva se fosse ler textos creacionistas.

O parágrafo final é hora colocar a sugestão no âmbito prático que é tema recorrente do blog. Diante de um projeto social a gente repete as mesmas tendências que diante de todas as outras informações. Se somos por uma causa, vamos concordar com ela, se somos contra, buscaremos suas falhas até além do bom senso. Educação é um tema de que (quase) todos concordam trazer benefícios sociais. Talvez não seja (ver tabela na pg.36). Mas se for, quem é pelo avanço tecnológico vai defender que o modo de resolver a situação é modernizar as escolas. Quem tem uma visão mais economicista vai defender aumentar os incentivos a professores e alunos. Quem foca nas relações humanas vai defender uma nova abordagem em sala de aula. Talvez seja bom que eles sejam tendenciosos a ponto de fazerem suas hipóteses virarem realidade. Só assim os céticos terão material menos especulativo para comparar resultados e apoiar o melhor programa. A sua vantagem é que a humildade epistemológica os permite abandonar as certezas iniciais. Alguém pensou em combater vermes para melhorar educação?


The boogerman (or on the concept of person)

 There is an extensive bibliography on animal ethics. There is also, a growing number of studies to find the roots of human morals based on animal behaviors of reciprocity and altruism. In face of that, can we envisage a philosophical approach to an ethics of animals? Not in the sense of human ethics towards animals, but as a search for some contributions to ethics extracted by moral behaviors identified in animals. Probably someone is already doing it, in the following I will start my first attempt.

I will try to show how animal behavior may prove the necessity for us to refine our notion of 'person'. This, I hope, will have an important influence on our own ethics (including the above mentioned already traditional field of animal ethics). I am happy that the philosophical vein of the text will allow me to proceed only through thought experiments. This discharges me of the responsibility to experiment with living beings. On the other hand, I'll bear some second order suffering in my hands because I'll use the results of some scientific experiments to develop the argument, mostly with rats.

Since a few years ago there is evidence that rats have some simple form of empathy. Bartal et al. identified an emotional contagion in the capacity of rats to feel in themselves what another rat is feeling. I hope to give a more deep treatment of empathy in a following essay. Now I want to proceed to the supposition that maybe they have some distinction that we use the vocabulary of 'person' vs. 'object' to convey.

In a recent study Nakashima et al. wanted to verify if rats could see and feel the pain in another rats face. To do so, they took pictures of rats with a neutral expression and rats with pain expression. Then, they decorated the walls of two rooms. One had the pictures of rats with a neutral expression and the other those with the pain expressions. When put into a structure composed of both of these rooms rats showed a pattern. They preferred to stay in the room decorated with the neutral pictures. This suggests that they can recognize pain in the face of the other and that they don't like what they see.

However, they also tested another scenario. They repeated the same set up, but now the photos of rats with pain expressions had their bodies airbrushed. Surprisingly, this time rats did no repeat the pattern of avoiding the room with pain faces. The scientists then assumed that the bodies of the rats may communicate some essential part of the pain information. It is based on this unexpected reaction that I want to develop another hypothesis.

I do not buy the explanation that bodily cues are somehow essential for rats to reckon the pain in the face of the others. It could be easily tested by putting pictures of montages of rats with pain faces over the bodies of rats not feeling pain. I guess they would once again avoid the room with such pictures. This hypothesis leads to the new interpretation I want to propose. What if rats failed to recognize the rats with airbrushed bodies as 'persons' and treated them as 'objects', therefore, feeling no empathy towards them.

I put 'person' and 'objects' in quotation marks because these concepts at first seem too human for the reader to accept that rats could have some primitive version of it. Concerning human beings we do know that when we see another human being as a person we perceive it as a whole. On the other hand, when we see them as an object (of desire, for instance), we analyze them by parts. Gervais among others have shown that men treat pictures of hot models as a bunch of (hot) pieces. Why can't complex animals as rats show a similar behavior of recognition?

If they do, they would need to see the other rats as whole to treat them as 'persons'. In the airbrushed bodies condition they simply failed to do so. Now we can start to see that our first skeptical reaction to the attribution of a concept of personhood in rats may be part of the problem. Note that the question is not if rats deserve the rights we humans attribute to persons (as is usual within the context of animal ethics). The question is if rats have themselves some concept equivalent to the human concept of person.

Usually a humans beings talk of a person to refer to someone who they recognize as being basically like themselves. The indeterminacy lies on what counts to be 'like themselves'. Europeans didn't consider indians to be like themselves for a period of history and maybe neither vice-versa. This doubt was put in christian terms of having a divine soul or not. In our times this may be translated as 'having whatever we think it is that makes us humans'. The candidates for these can be cultural like religions, arts and mathematics; corporeal like feelings of pain and pleasure or those concerning the mind like self-conscience, memory of past experiences and planning towards the future and so on. We could spend some time trying to better determine this definition. It does seem as a useful enterprise, but I shall content myself with the start-up.

Just to refresh: Rats identified themselves with the rats in pain in the photos. They also did not mind with the grimace faces seen on airbrushed rats. These reactions seem close enough to the ones we would suppose of someone treating the first groups as 'persons' and the second one as 'objects'. If so, we have two main alternatives. Either we acknowledge to rats the specific concept of rat-person. But in this case we could fall into an infinite regression and be obliged to postulate concepts of horse-person, monkey-person and so on. Or we can expand our concept of person to be suitable for other complex animals to have it. This means extracting the determination of 'human' in the definition of person.

Note once again that to attribute the concept of a person to rats is different from extending to them the rights that we human beings assure to those under our concept of person. The effort here is to see how an inconsistent notion of 'being like ourselves' are part of the working brain of a rat. Once that is understood, one must suppose a broader definition of person. My first attempt came out as: 'identifying some individual as having approximate complex internal experiences in the face of existence as oneself'. For the rats, rats in the photos have that while rats with airbrushed bodies don't. Conversely, humans that see only their small tribe as worth the categorization of a person are being (expectedly) as close minded as the rats in the experiment. They all treat as an object whatever small deviations they find to exclude an individual from what they believe is the norm. Happily enough, other complex animals show that personhood does not need to be an interspecies concept. For instance, when horses or dogs recognize the feelings of human beings they are using their concept of person to identify themselves with other individuals. Note that on this version it will be easy to include computers in the category of persons.


One last problem. If the concept of 'person' needs to be broad but remains subjective will it become senseless? I mean, I just need to identify myself with the booger I have just taken out of my nose for it to be referred as a person? It will be nice not to have to allow that. But then we will have to accept that person will always be a biased term? Maybe a little self-predication may be of some help at list once in the history of philosophy. What if 'having a biased concept of person' is the unbiased condition that we need to determine what it is to be a person? Some individual or species that can identify others (even if in a biased manner) as being like themselves, do not make these others persons, but prove that they (those able to do the identification) are to be considered as persons. To cut it short: seeing others as persons makes you (not the other) a person. Thus, seeing my booger as a person makes my a person (maybe a crazy one) but it does not say anything about the personhood of the booger.