“According to modal realism, possible worlds really exist” writes Jennifer Fisher in his book On Philosophy of Logic (p. 91.). This approach is based on modal logic that interprets true and false statements in relation to possible worlds: E.g. necessity means that the statement “is true in all possible words” (Ibid, p. 75.) and our actual world is nothing more than a world which was chosen from the set of other, existing ones. I don’t accept modal realism’s logic (after all, possibility isn’t equal to existence), but it is interesting from our point of view that the logic of modal worlds is similar to the logic of classic multiverse hypothesis that assumes the existence infinitely many words and this similarity shall lead us to a strange type of imaginable universes.
Max Tegmark interprets the multiverse as the manifestation of every mathematically possible world. It is a form of mathematical Platonism, and the main thesis is that on the one hand, anything is possible mathematically exists in reality. On the other hand, everything is governed by the rules of mathematics. “Mathematical” means in this case that every combination of different sets of physical laws and constants, or even different equations exist. In other words: according to Tegmark, all words can be described by mathematics and every imaginable combination is manifested in a really existing world. The core of Tegmark’s concept is that mathematics is equal to physics in a certain sense, since it describes the world ruled by physical laws.
But it is not sure that even our universe can be described perfectly by mathematics and perhaps only our belief suggests that every natural phenomenon is controlled by either deterministic, or probability or evolutionary laws. Inter alia, it is possible that the Great Unified Theory (GUT) doesn’t exist, since there is no mathematics to describe every connection. It is perhaps only about our inability to give a coherent description about reality, since our tools (including our minds, mathematics and logic) aren’t appropriate for it.
Or, it is imaginable that there are universes that cannot be described by mathematics at all: after all, mathematics is based on the presumption of the conservation of some rules. Thus, it is not necessarily well-founded to state that every universe is mathematical in nature. So we can imagine whole universes (albeit they wouldn’t be biofil) without mathematically interpretable natural laws. In other words: although they exist, they cannot be described by one or other mathematical form of physical laws.
Traditionally, we distinguish existing and non-existing worlds and the main sin of modal realism is that it intermixes these two categories. Now we can introduce a third kind of universes which differ from both the “existing” and “non-existing” ones and since per definitionem it is impossible to give a scientific description about their features, they don’t belong to the realm of physics.
Showing posts with label philosophy. Show all posts
Showing posts with label philosophy. Show all posts
02 July 2015
09 February 2015
Readings: applied philosophy of science I.
So do you want to study the problems related to this field?
Basically there are two kind of reading lists. The first one is for those who want to examine a certain field – i.e. the applied philosophy of science (after all, what else:-). The second one is for those whose aim is not to become an expert of that field, but intend to apply its results. This list belongs to the second category: I am aware that reading Kuhn or Popper (not to mention Merton or Hull or Aristotle) is a really enjoyable form of either recreation or scientific research. But it is not necessary to apply their results. So you do not need to read all the classics – it is enough to understand them to an appropriate level.
I collected some readable and easy to understand, but serious titles. They are usually available either in bigger libraries or via an online bookshop. Their subjects are divided into about five groups: general philosophy; philosophy of science; philosophy of mathematics (as the traditional natural sciences based on it); SETI; cosmology and miscellaneous readings.
My approach is mainly physics centered, but I hope that it is a useful list even for those who are interested in, for example, evolution. Obviously, there are other, equally good works about these topics, but they are my favorites, so this list at least partially about my personal preferences. My advice is to read them in the following order:
GENERAL PHILOSOPHY:
1. Baggini, Julian – Fosl, Peter S.: The Philosopher’s Toolkit. A Compendium of Philosophical Concepts and Methods (Wiley – Backwell 2010)
In accordance with its title, this volume is about philosophical tools and their usage from axioms and hypothetico-deductive method to the meaning of a priori; self-defeating arguments and Hume’s fork. Use it as a thinking toolbox – very efficient.
2. Warburton, Nigel: Philosophy. The Basics (Routledge 1999)
Survey about “general beliefs” from the meaning of the life to the existence of God and the design argument; common-sense realism; negative freedom… etc. This book discuss these basic themes from a non-historical, problem oriented point of view.
3. Scruton, Roger: Modern Philosophy. An Introduction and Survey (Mandarin 1994)
It discusses more subjects than typical for introductory texts from intentionality to modality and space and time in a lucid and readable style. Offers a deep and sympathetic understanding.
PHILOSOPHY OF SCIENCE:
4. Okasha, Samir: Philosophy of Science. A Very Short Introduction (Oxford Univ. Press 2002)
What is science? Problems of reasoning, explanation, realism and anti-realism and philosophical problems of physics, biology, psychology... Short and compact summary of the main problems of philosophy of science – a good starting point to understand some basic concepts.
5. Godfrey-Smith, Peter: Theory and Reality. An Introduction to the Philosophy of Science (Univ. of Chicago Press, 2003)
Deep and detailed guide to the 20th century’s developments from logical positivism to Feyerabend, Latour and feminist criticism. It was written for students learning philosophy of science, but accessible to a reader with general interest without any background in philosophy, as well.
6. DeWitt, Richard: Worldviews. An Introduction to the History and Philosophy of Science (Wiley – Blackwell 2010)
In accordance with its title, it is about both history and philosophy of science. The story begins with Aristotle and his “grocery list” of beliefs, and ends with quantum theory and locality. DeWitt shows why a certain worldview (either Aristotle’s or Tycho’s) seemed to be acceptable to their contemporary thinkers, and offers an inner picture about these approaches. History and philosophy is interwoven in it, and it is not an accident, since both of them are required to understand the process of science.
7. Henry, John: A Short History of Sceintific Thought (Palgrave – Macmillan 2012)
History of scientific thought as a fuel of philosophy of science. The emphasis is on the developments of science; a readable style with a lot of piece of information – even a historian of scientist would find both new data and contexts in it (unless he/she is an expert of the whole history of science from ancient Greek philosophers to Hutton and Baresh Hoffmann – but it is not too probable).
to be continued...
Basically there are two kind of reading lists. The first one is for those who want to examine a certain field – i.e. the applied philosophy of science (after all, what else:-). The second one is for those whose aim is not to become an expert of that field, but intend to apply its results. This list belongs to the second category: I am aware that reading Kuhn or Popper (not to mention Merton or Hull or Aristotle) is a really enjoyable form of either recreation or scientific research. But it is not necessary to apply their results. So you do not need to read all the classics – it is enough to understand them to an appropriate level.
I collected some readable and easy to understand, but serious titles. They are usually available either in bigger libraries or via an online bookshop. Their subjects are divided into about five groups: general philosophy; philosophy of science; philosophy of mathematics (as the traditional natural sciences based on it); SETI; cosmology and miscellaneous readings.
My approach is mainly physics centered, but I hope that it is a useful list even for those who are interested in, for example, evolution. Obviously, there are other, equally good works about these topics, but they are my favorites, so this list at least partially about my personal preferences. My advice is to read them in the following order:
GENERAL PHILOSOPHY:
1. Baggini, Julian – Fosl, Peter S.: The Philosopher’s Toolkit. A Compendium of Philosophical Concepts and Methods (Wiley – Backwell 2010)
In accordance with its title, this volume is about philosophical tools and their usage from axioms and hypothetico-deductive method to the meaning of a priori; self-defeating arguments and Hume’s fork. Use it as a thinking toolbox – very efficient.
2. Warburton, Nigel: Philosophy. The Basics (Routledge 1999)
Survey about “general beliefs” from the meaning of the life to the existence of God and the design argument; common-sense realism; negative freedom… etc. This book discuss these basic themes from a non-historical, problem oriented point of view.
3. Scruton, Roger: Modern Philosophy. An Introduction and Survey (Mandarin 1994)
It discusses more subjects than typical for introductory texts from intentionality to modality and space and time in a lucid and readable style. Offers a deep and sympathetic understanding.
PHILOSOPHY OF SCIENCE:
4. Okasha, Samir: Philosophy of Science. A Very Short Introduction (Oxford Univ. Press 2002)
What is science? Problems of reasoning, explanation, realism and anti-realism and philosophical problems of physics, biology, psychology... Short and compact summary of the main problems of philosophy of science – a good starting point to understand some basic concepts.
5. Godfrey-Smith, Peter: Theory and Reality. An Introduction to the Philosophy of Science (Univ. of Chicago Press, 2003)
Deep and detailed guide to the 20th century’s developments from logical positivism to Feyerabend, Latour and feminist criticism. It was written for students learning philosophy of science, but accessible to a reader with general interest without any background in philosophy, as well.
6. DeWitt, Richard: Worldviews. An Introduction to the History and Philosophy of Science (Wiley – Blackwell 2010)
In accordance with its title, it is about both history and philosophy of science. The story begins with Aristotle and his “grocery list” of beliefs, and ends with quantum theory and locality. DeWitt shows why a certain worldview (either Aristotle’s or Tycho’s) seemed to be acceptable to their contemporary thinkers, and offers an inner picture about these approaches. History and philosophy is interwoven in it, and it is not an accident, since both of them are required to understand the process of science.
7. Henry, John: A Short History of Sceintific Thought (Palgrave – Macmillan 2012)
History of scientific thought as a fuel of philosophy of science. The emphasis is on the developments of science; a readable style with a lot of piece of information – even a historian of scientist would find both new data and contexts in it (unless he/she is an expert of the whole history of science from ancient Greek philosophers to Hutton and Baresh Hoffmann – but it is not too probable).
to be continued...
26 January 2015
Tool-driven revolutions and cosmology
Since the 15th century says Dyson, only a half dozen concept-driven revolutions happened: Copernicus, Newton, Darwin, Maxwell, Freud and Einstein, but about two dozen tool-driven revolutions from Galileo’s telescope to the Watson-Crick DNA model based on X-ray diffraction [Imagined Worlds, p. 50].
It is not an accident that the idea of tool-driven revolution appeared in the last century. It was the age of the “big science” when industrial nations’ mega projects from Hubble Telescope to Large Hadron Collider and to HUGO became to dominate experimental sciences, and it was evident to plan the research programs to fit to the billion dollar equipment, and not vice versa.
Parallel with Dyson, scientific historian Peter Galison published a book about the “visual culture of microphysics” arguing that traditionally the scientific activities are divided into theoretical; instrument building and experiments [Image and logic, 1997, p. 799] and theory was regarded to be the most important part.
Historically, an experiment can served for three purposes. In the Middle Ages its function was to demonstrate the known truths (similarly to the universities’ public debates which aim was to demonstrate debate skills. A student had to defend, another had to attack an Aristotelian statement, but proving that Aristotle was “wrong” showed only the winner’s persuasive argumentation, not the ancient philosopher’s fault [John Henry: A Short History of Scientific Thought 2012, p. 49].)
Today an experiment can be used either for “verify” a theory or as a starting point of a new one and it can lead to a tool-driven revolution. In short, a theory-driven revolution is a new answer for old questions; tool-driven revolution is a new answer for new questions. A philosopher can says that a Kuhnian revolution is a posteriori, while a tool-driven one is a priori.
Obviously there is no a way to sharply divide theory from practice. The classical mechanics of 19th Century relied heavily on models where the forces, effects etc. were visualized by the imagined combinations of pulleys, levers etc. And Galison pointed out that Einstein’s position in the patent office was not isolation, but ideal to review the technical/mechanical innovations – including the problem of the synchronization of electric clocks [Jon Agar: Science in the Twentieth Century and Beyond, 2012, p. 29].
Similar to experiments which have different usage, there are some different methods to use mathematics in natural sciences.
- Newton developed a new kind of mathematics to solve certain physical problems. Opposite to it,
- Einstein choose an existing mathematical solution to answer a known physical question
- A third opportunity is to apply mathematical concepts for natural sciences directly. In mathematics not only potential, but actual infinity exists, so a physicist who simply use mathematics as a tool, probably accept the existence of actual infinity in physics without any reflection (see black holes and other exotic entities), although its existence in reality is not proven.
These mathematics-like thinking tools became more and more important, since there is no opportunity for a real experiment in connection with the multiverses, for example.
“Philosophy has not kept up with modern developments in science,” thus it “is dead” writes Hawking [The Grand Design 2011, p. 13]. But Roger Scruton underlines that philosophy’s aim is not to find real solution for real problems (i.e. the path of an asteroid), but to answer “abstract” and ultimate” questions [Modern Philosophy 1994, p. 3].
My prediction is that the traditional, experiment dominated science will be split up to tool-driven big science and a field dominated by thinking-tools. So we have two choices. If we want to believe that science is competent even there is no a chance for an experiment then we have to redefine the meaning of science. Or, we have to recognize that philosophy annexes some parts of modern natural sciences.
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