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" Doubt is the key to knowledge " ( Persian Proverb ). To what extent is this true in two areas of knowledge ? Have you ever thought what is doubt , knowledge and how they are related . Doubt is a status between belief and disbelief . Knowledge is defined by the Oxford English Dictionary as (a) expertise, and skills acquired by a person through experience or education ; the theoretical or practical understanding of a subject; (b) what is known in a particular field or in total; facts and information; or (c) awareness or familiarity gained by experience of a fact or situation. However there are no one agreed definition of knowledge. Notion of "doubt" plays an important role in knowledge. I believe is the key to knowledge, because doubt brings thinking and without thinking , we would not be able to make any progress in knowledge. We should not doubt everything what we can all the time, because it can even stop our development. If for example a person has doubts about the experiment he has done and he checks what was done and was find, repeats an experiment for 15 more times doubts might not gone and in the end there would be only the waists of time and stop of development. ...read more.


Say we do find a galaxy for which Newton's laws do not apply , we would then create new theories that can be proven to work with the newly acquired knowledge and do work with this other galaxy. This shows that doubt aids us in the search for new knowledge, as the idea of absolute certainty, in every possible situation, is only something we can dream of. Every new discovery we make in the natural sciences will lead to more questions revolving around it : " Why does it work? " , " How does it work? " , "Does it always work?". The last question is essentially what doubt in natural science is all about. Furthermore , by doubting science we are always searching for more . " Is there an end to science ? " This question is unanswerable but approachable because we should doubt everything to progress further in science , to expand our knowledge . Doubt should not be in excess however, as with the example of Newton's laws. We state that the gravity is what pulls us towards the planet, and no scientist would disagree. ...read more.


We need doubt in the human sciences to further develop theories because humans never stop changing, and therefore the human sciences can never be entirely coherent with humans. We can only try to achieve this coherence by questioning every theory over and over. We have seen that doubt is a necessity to expand our knowledge. It is also used to further evolve our theories and hypothesis by falsifying current ones. By continuously doubting the natural science theories we can find some new exceptions . Due to humans changing indefinitely we can never be entirely certain as to how correct our theories, which are actually only hypothesis, are. By doubting them and comparing them to historical events we can place some certainty on their applications. The unknown situations are what we must doubt the theories in, but experimentation is more difficult for human sciences. One cannot simply experiment with humans . All in all an equilibrium must be found between doubt and confidence when making decisions related to both human sciences and natural sciences if we want to obtain more knowledge, as knowledge has no limit as we know it and only doubt will bring us closer to it , in this view doubt is the key to knowledge. 1220 ...read more.

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