"Science is one of the very few human activities - perhaps the only one - in which errors are systematically criticized and fairly often, in time, corrected. This is why we can say that, in science, we often learn from our mistakes, and why we can speak clearly and sensibly about making progress there." - Karl Popper
It may sound quite paradoxical, but accepting the lack of final and unmovable answers does not, in fact, make a person more insecure, but it can make one’s life much more secure. Of course, one can not forget the sorry fact of life that humans are as species prone to seek absolute truths even in places where absolute truths cannot exist.
However, if I base my life-stance on any kind of prophesied or revealed 'absolute truths', my life will be quite inevitably badly shaken if I some day do find out that they are not in fact the absolutely truths.
On the other hand, a person who has from the beginning been expecting to find better and better answers as he or she goes along, as so typically happens in science, does not generally have to face such disappointments.
Even a very strong inner conviction about an ‘absolute truth’ needs not to have any truth-value at all, if it is based on some kind of prophecy or inner revelation and it does not get any better with time.
On the other hand just an educated guess that is formed by using the scientific method that is based on even partially known facts does just become the better, the more facts are to be known later on, even if a final and unmovable answer may probably often never be available.
So, a bit paradoxically one could even say that a life-view which is based on set of non-moving and absolute truths is on much shakier foundations than a life-view that is based on movable and changeable sets of ‘truths’ and ideas.
In the latter case, one can expect new truths to surpass even the most established old ones, if new knowledge really does require doing it. Facing the quite inevitable vast changes in the world and knowledge of it do not leave a person gasping for air, as is often the case if a thing that has been seen to be an ‘absolute truth’ is surpassed by new and better knowledge.
Of course, just learning a simple set of unmovable ‘truths’ and living trusting in them, no matter what, is always the easy way out, but the easiest and cheapest things are not necessarily the best ones here as they are not in the life in general.

However, there does exist a wide set of ‘good enough truths’ in science, which are on the surface as unmoving and stable as some of the ‘absolute truths’ that are offered by religions. For example, the theory of gravity or the theory of nature of light have not been changed for a very long time.
However, the real modern scientific method is very deep down based on the assumption that we can never know even these things for sure.
All facts and new ideas that are presented in the realm of science are always, in the end, just the best possible approximations and even educated guesses that we can make at any given moment. A real scientific guess is, however, always based on the best possible currently available evidence.
It is also always subject to change, if compelling and widely enough accepted new evidence does become available.
Of course, some of scientific theories have achieved such levels of accuracy, that there has not been any need to change them for a very long time. We can, in practice, even treat them very similar to ‘absolute truths’ in everyday life.
It is possible to base other theories on them in the full knowledge that there is currently no reason whatsoever to doubt them. That does not mean that there would not always also remain the possibility, that they need to be changed on a later date, and the theories that were derived from them need just to be adjusted as well.
This is, of course, the real big difference in science, when it is compared with religions. In them an awfully lot of things are commonly presented as unmovable truths, that need and can never to be questioned, as they just are assumed as given from the beginning.
However, if I put my trust in science, I do not, if fact, have to trust in any kind of unmoving model of ideas and universe, but in fact I put my trust in the idea that we can improve our knowledge of our universe constantly.
Of course, dogmatic beliefs can and have arisen also in the realm of science, as for example the Aristotelian ideas that held sway for centuries. However, when the basic ideas of change and improvement are accepted in the core of the system, change and improvement really do occur much more easily than in any truly dogmatic system of thought.
(the following ideas on absolutes are from my earlier posting in this blog, but I think I need to bring these ideas up here also)
In fact, come to think of it, most things in the world really do not have any definite, final answers; contrary to what many people would like to think. Of course, final-sounding answers are often very cozy and comforting.
As Bertrand Russell famously said, claiming to have certainty when there is, in fact, none available is a very common human vice, but it is still a vice.
Realizing this does not stop us from striving to have the best possible knowledge it is possible to acquire; in fact, just this realization can be the driving force that will constantly increase knowledge of humans, our societies and of the universe.
History already does amply show that the love of comfortable, unmovable truths can slow or even stop altogether human progress, if we just allow these unmoving truths to accumulate deep enough.
One of the deepest human emotions is the desire for security and certainty. Humans have after all lived for millions of years in unpredictable, often hostile environments, where danger can lurk anywhere and a sanctuary offered by any kind of certainty has always been welcome.
The feeling of knowing for certain where one really stands just is an extremely satisfying feeling for all humans. This is of course one of the main reasons why the religions have been so successful, as they do offer absolutes in areas where absolutes cannot exist.
This very desire for certainty could also be one of the reasons why it could be very hard for some to swallow the things that I want to say next. Namely the more I have thought about it, the more I have become convinced that no unequivocally unchanging or in other words ‘absolute’ truths do exist in the real world in which we do exist.
I claim that absolute truths do exist only in the shadow world of theory and ideas, which is basically a mental reflection of the real world that the human mind can and will create.
In this world of ideas and theory things can be processed in a quite different way than in a real world and often quite independent of it. This world of ideas and theory is of course mostly based on the perceptions we have of the real world.
However, as it is not constrained by the limits imposed by the real world, the things that we do create in the world of ideas and theory do not need to have any connections with the real world in the end, as so often happens in religions.
On the other hand, especially in the world of science some kind of connection to the real world is always required even from the most far-fetched ideas and theories for them to be seen as part of science.
Science can reveal patterns and connections which are hidden from the naked eye and which do exist between many kinds of real world objects and phenomena, but in real science they are always derived from the properties of real-world objects and phenomena.
This idea is of course also a complete reversal of the Plato’s famous allegory of the cave, in which ordinary people see just the shadows of universal ideas that can be seen only by ‘philosophers’ or people with exceptional capabilities and the real-world objects we see are just imperfect copies of some kind of perfect, ideal models of things that do exist in some kind of higher level of existence.
Of course, Plato is just plain wrong and the reverse is true; humans can (and do) create perfect ideas of things that do all exist so imperfectly (and with great variations) in the real world.
The more I think of it the more I do become convinced that the things and phenomena that do seem to be held as absolutely true on the surface are that mostly just because of how we interpret and observe things as humans with a set of certain very restricted capabilities.
I do even think now that unequivocally absolute and unchanging truths can in practice exist only in an abstract universe, which is not bound by the laws of nature.
Of course, even this claim cannot be an absolute truth; it is true even for me only as far as I do not gain knowledge of any absolute truths that exist in the real world and which cannot ever be changed by anything.
At this point ,it is good to remember that even the sun will rise on Earth for over 5 billion more times, but one day the red giant that once was our sun will swallow the planet Earth and the sun will never rise again.
So, the fact that the sun always rises on Earth is not an absolute and unchanging truth. It is just an undisputed fact that has the value of a ‘absolute truth’ only for a limited duration of time.
The following idea may seem even outrageous for some people, but I do think that also logic can be absolutely true only when it is applied to things where also the premises used are always absolutely true and will never change.
As far as I know such things do exist only in the abstract world, not in the real world in which we do live in, as all the things that we deal in a real world can change with time. Only abstract ideas and abstract thoughts can remain unchanged forever.
Of course, logic can be an extremely valuable tool, even if it is not absolutely true, but just true enough to serve our practical purposes.
In the end logic just is only as true in our practical world as are the practical premises that are being used, even if in the world of theory an idea can sound and shine like an absolute truth.
So, a chain of logic can appear to be ‘absolutely true’ on the world of ideas, but it does normally become compromised the very moment when it is applied to any kind of real-world problem, as in the real world things do not always remain stable and unchanged.
Any fact or an idea that could be an extremely true and well established fact yesterday just may be false today or after five or five billion years.
In a similar vein, the vast field of metaphysics which just loves to deal with absolutes can producevery absolute-sounding ideas only because it deals with pure abstractions which do not exist in the real world.
In fact, most metaphysics cannot be applied to the real world in any meaningful way. A lot of metaphysics is ,in fact, just built to support some of the real world-ideas that we do already have.
There simply is no right or wrong metaphysics, but there is only currently popular or less popular metaphysics. In the end, there simply is no way of ever showing which of the ideas presented in metaphysics could be the right ones. A sure sign of this is that no major metaphysical idea that has ever been presented is not without its fans today.
So, an idea, which is presented as metaphysical preposition is already beyond any real evaluation when it is presented as metaphysics. This is of course a tactic that has been used extremely successfully by many kinds of religious apologists, but also by Marx and many of his followers.
The hardest thing to swallow for many could be that in my mind even mathematics is absolute only as long as it is used theoretically. It might be hard to accept that all mathematical equations that do not concern real world objects or their properties are theoretical in nature.
The equation 2 + 2 = 4 is just a mathematical theory of how things can be added up. Counting first two fungus and adding two fungus to it can produce a result of four fungus, but as in the real world it is often quite impossible to say where one fungus starts and a second stops, the result is always just ‘about four’ and not any kind of absolute.
As soon one starts to count a real objects with the 2 + 2 = 4 equation this equation becomes an approximation and the real result depends how one defines the things that are being counted.
So, even the equation of “2 + 2 = 4” is absolutely true only as long as it is not applied to the real world, and do not of what are the things that are to be counted. The moment we apply it to real world objects there is an element of sudden change and surprise that do make the exact result less than absolute.
There are of course other things that seem to be absolutes; for example the speed of light or many of the properties of sub-atomic particles.
However, they are absolutes only in our own version of the universe, but if any of the multiverse-theories does really hold water, the constants that we see as unmoving and final just could be one version of the thing and the same values could anything in a different parallel or even serial version of the universe.
Of course, we have no real way (at the moment at least) for finding out if the multiverse-theory is true, but as there is a real chance of it being true, even the most absolute-sounding things can be less than absolute.
All this does not mean that I would claim that there could not be any absolute truths. I am just saying that I do not know of things that would be always true without any kind of change making them possibly untrue some day.
The time-frames required for these changes can be of course be beyond the real capabilities of the human mind.
Of course, in practical terms there are very many things that can be treated as being ‘absolutely true’ in real life, even if we know that also they can change on some extremely distant day.
(The beginning of this piece was completely rewritten and the headline was changed at 14th of August)
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