What is Reason: Definition and 289 Discussions

Reason is the capacity of consciously applying logic to seek truth and draw conclusions from new or existing information. It is closely associated with such characteristically human activities as philosophy, science, language, mathematics, and art, and is normally considered to be a distinguishing ability possessed by humans. Reason is sometimes referred to as rationality.Reasoning is associated with the acts of thinking and cognition, and involves using one's intellect. The field of logic studies the ways in which humans can use formal reasoning to produce logically valid arguments. Reasoning may be subdivided into forms of logical reasoning, such as: deductive reasoning, inductive reasoning, and abductive reasoning. Aristotle drew a distinction between logical discursive reasoning (reason proper), and intuitive reasoning, in which the reasoning process through intuition—however valid—may tend toward the personal and the subjectively opaque. In some social and political settings logical and intuitive modes of reasoning may clash, while in other contexts intuition and formal reason are seen as complementary rather than adversarial. For example, in mathematics, intuition is often necessary for the creative processes involved with arriving at a formal proof, arguably the most difficult of formal reasoning tasks.
Reasoning, like habit or intuition, is one of the ways by which thinking moves from one idea to a related idea. For example, reasoning is the means by which rational individuals understand sensory information from their environments, or conceptualize abstract dichotomies such as cause and effect, truth and falsehood, or ideas regarding notions of good or evil. Reasoning, as a part of executive decision making, is also closely identified with the ability to self-consciously change, in terms of goals, beliefs, attitudes, traditions, and institutions, and therefore with the capacity for freedom and self-determination.In contrast to the use of "reason" as an abstract noun, a reason is a consideration given which either explains or justifies events, phenomena, or behavior. Reasons justify decisions, reasons support explanations of natural phenomena; reasons can be given to explain the actions (conduct) of individuals.
Using reason, or reasoning, can also be described more plainly as providing good, or the best, reasons. For example, when evaluating a moral decision, "morality is, at the very least, the effort to guide one's conduct by reason—that is, doing what there are the best reasons for doing—while giving equal [and impartial] weight to the interests of all those affected by what one does."Psychologists and cognitive scientists have attempted to study and explain how people reason, e.g. which cognitive and neural processes are engaged, and how cultural factors affect the inferences that people draw. The field of automated reasoning studies how reasoning may or may not be modeled computationally. Animal psychology considers the question of whether animals other than humans can reason.

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  1. S

    What is the reason for grounding a circuit ?

    I have seen that in some circuits there's grounding...I know that earthing is for keep a part of a circuit in a zero potential...Don't know why it's done...Here's some circuit's..Tell me why it's been earthed..
  2. C

    The reason why healthy things taste bad

    Have you ever wondered why what tastes good is often not healthy despite the fact that from evolutionary point of view the whole purpose of taste is to get you to eat what is healthy? I found an interesting explanation that probably none of you have thought of. On a grand scheme of things, what...
  3. D

    Limits to pure reason and nature of reality

    Hi all, I have a little out of track question and I was forced to consider this after reading FQXI Essay competition title Is Reality Digital or Analogue and Kant's Critique of Pure reason simultaneously. If I am not wrong, according to Kant, there are limits of pure reason. Is not the...
  4. A

    Why Work is a Scalar Quantity: Exploring the Reason

    We know that work is the dot product between force and displacement .. so dot product always gives scalar (horizontal projection etc) hence work is a scalar quantity? I want the reason behind it... we always do work in specific direction.. suppose a man in appliying force at the angle...
  5. S

    Massive Stars Spin Faster: The Reason Explained

    It is said that massive stars spin faster than less massive ones and I am always wondering why.Could someone please tell me the reason? Thanks a lot.
  6. H

    Entropy Rise: Causes and Effects

    Hello, I'd like to get some more accurate idea of entropy in general: dS=\int\frac{dQ}{T} Given an adiabatic isolated system. Work is irrerversible done onto this system. Entropy will rise because of the fact that some of the work is transformed into irreversible losses and therefore...
  7. M

    Newton's Weight on Earth: Reason Explained

    statement: body's weight Newton on the surface of earth.Its weight one-earth's radius above the surface will be one-fourth weight. can you tell me the reason.. why?
  8. P

    Time Moves Forward for Obvious Reason?

    I tried to pick the most appropriate subforum, feel free to move this if there's a better one! I'm not a physicist, but I had an epiphany recently that I've never see anywhere else, and it seems so incredibly obvious that I think it's either the accepted theory of time directionality, or I'm...
  9. S

    Reason behind so called Optical illusion or Simultaneous contrast

    Hello everyone, I am really looking out for some literature which has reported the physics behind the occurrence of the phenomena in which two blocks of same color seems different when kept in different background. I have attached an image which depicts the query in a very evident manner...
  10. rhody

    Important reason for squashing software bugs accuracy of scientific discoveries

    http://www.theregister.co.uk/2011/09/22/cern_coverity/"]CERN's[/PLAIN] boson hunters tackle big data bug infestation It's the software or the science that's been wrong One's analysis when processing experimental data must account for possible errors in the tools used to identify and detect...
  11. 1

    Fluid force on a dam just trying to reason with the problem

    Homework Statement A dam is shaped like a right triangle, 4 height and 6 across. The right triangle is oriented so that the right angle is at the TOP RIGHT. (we are looking at the face of the dam) Density is a weight density, and is 64 lb/cubic foot Homework Equations The...
  12. S

    WHAT is the reason gravity SHOULD be stronger than maganetism?

    What is the reason gravity should be stronger than magnetism. I heard a speaker talk about what prompted scientists to look for other dimensions, and it was because they were looking for the drain on gravity, but what is it about gravity that makes it appear that it SHOULD be stronger than...
  13. M

    Select the FIRST correct reason why the given series converges.

    Homework Statement Select the FIRST correct reason why the given series converges. A. Convergent geometric series B. Convergent p series C. Comparison (or Limit Comparison) with a geometric or p series D. Converges by alternating series test The Attempt at a Solution I will...
  14. A

    Uncovering the Mystery of Sunspots: Exploring the Phenomenon on the Sun

    Why does the sun have dark spots on it (sunspots)?
  15. F

    Physical reason behind Plane Stress

    I can now although do the maths related to plane stress etc but I have struggled to grasp the logic behind this concept. It says changing the way you see the stress by rotating the view, stress changes. My question is why ? Why is this so that we see stress with one value when standing at let's...
  16. D

    Thevenin's Theorem : Reason behind 'nullifying' or 'suppressing' sources?

    WHY aren't voltage sources open circuited and current sources short circuited? Thevenin's theorem (and even Superposition Theorem) states that we need to 'suppress' or 'nullify' the effect of all sources. We do this by short circuiting voltage sources and open circuiting current sources. WHY...
  17. D

    Karnaugh map - Any reason to flip it, ever?

    Why, hello there. I'm doing Karnaugh maps. I'm using them to device gates to express the numbers 0, 1, 2, 3, 4 in a seven segmented digital display. Our teacher has provided us with predrawn Karnaugh maps, where we simply fill in the 1's and 0's. However, he's decided to invert the...
  18. N

    Another reason beards are awesome.

    Hello! Beards are awesome. There is no denying that a beard is the ultimate symbol, for men and women, of awesomeness. The most awesome and legendary of beards, is of course, that of Karl Marx. This is fact. Karl Marx's beard is also, although not fact but supported by strong evidence...
  19. jtbell

    Another reason not to join Facebook

    I've never gotten around to joining Facebook, and lately I've become happier and happier about that, e.g.: Facebook's Ticker broadcasts everything you do (CNN/Money)
  20. 1

    Rhyme and Reason Behind Radians?

    Preface: This question is a result of personal interest, and has nothing to do with any assignment. Okay here's the deal; I've tutored trig in the past, and I've noticed one thing that a lot of folks have trouble with is the fact that there are two pi radians per circle. (It doesn't help that...
  21. W

    Reason justifying it's own reasonings.

    I think this process happens very often. Somebody starts with some assumptions or premises and his or her reason is justifying these premises. I mean words are circular after all and if you open any book on theology and/or God you might get my point. Here's the question. How do we avoid...
  22. G

    What is the reason for using aluminium foil to wrap the food items?

    aluminium is a good conductor of heat, but still it is used so that food remains warm. what is the reason behind it?
  23. E

    Neutrino oscilation-theoretical reason

    Is it possible shortly to explain, what is reason that neutrinos oscilate, from one color to others? It can be found some articles, but, is it possible in a few word, maybe in similar language as Feynman, who use basic rules of quantum physics.
  24. B

    Reason for Loss of Mas of Planet Mercury

    A little over a year ago, I came upon the idea that the eccentricity of Mercury's orbit around the sun creates a tremendously oscillatory solar gravitational force (essentially, massive "solar tides"), which ripped the tectonically dying (now tectonically dead) planet apart.* It also included an...
  25. C

    Exploring the Qualitative Reason Behind VDW's \rho^2 Dependence

    In van der Waals' equation for real gases, the adaptation to account for intermolecular attractions in real gas is a\frac{n^2}{V^2}. This implies that the pressure due to the VDW forces on the container is proportional to the square of the density, \rho^2 = \frac{n^2}{V^2}. When I do...
  26. W

    Can Faith and Reason Coexist in Modern Society?

    Science and Religion have become antonyms. One has been defined 'rationally' and the other 'irrationally' respectively. So, is it possible nowadays to have faith through reason? Many forefathers of science believed in this.
  27. D

    What is scientific reason behind skin effect of conductors?

    What is scientific reason behind skin effect of conductors?
  28. GRB 080319B

    Why is Voltage More Useful Than Electrical Potential Energy?

    Why is electric potential (voltage) necessary? I can see how creating the electric field as the force per unit charge allows the force on one charge in the field of another charge to be calculated and accounts for the observed action at a distance by forces. I don't see the correlation of...
  29. P

    How reason that an algorithm has n*logn time complexity?

    Some time ago I wrote an exam where I had to write a pseudocode to sort elemens in a list. I used a quicksort with the pivot in the middle and wrote that the algorithm has time complexity in best case O(n*logn) because it is a divide-and-conquer algorithm. That didn't satisfy my teacher and he...
  30. Simfish

    Is there a physical reason why conservation of momentum HAS to happen?

    It's a fundamental principle. But *why* does it have to happen? I can easily intuit why conservation of energy has to happen, and I can also intuit why conservation of mass has to happen. But with conservation of momentum, I can't intuit why.
  31. I_am_learning

    News Reason for conflicts in the world?

    Do you consider this the reason for conflicts in the world- Political Leaders Love their country men more than people in other countries, they love their family more than their country men and they love themselves and their egos more than anything else. In more clear sense, I meant that the...
  32. P

    The reason behind the inverse proportionality r^2 to the force of attraction

    Does anyone know how Newton knew that the force of attraction between two objects is inversely proportional to the distance between the two objects.
  33. K

    News What is the real reason the US is in so much debt?

    I would like to talk economics. One thing that is clear to me, at least historically, is that our deficit problem transcends political party. We have been running a deficit (often increasing deficit) through generations of different political rule. Please keep the political finger-pointing...
  34. P

    Become a Scientist: Reason and Philosophy for Biology

    I know reason is thought in a philosophy course, and scientists are very good at reasoning, so does that mean all scientists took a course philosophy to learn how to think critically and reasonably? If not, then how does a student of biology learn how to think outside of his field of study...
  35. Pattonias

    If ever there was a reason to destroy the sun

    I found this hilarious. This guy makes a pretty amusing argument for why we should destroy the Sun. http://destroythesun.com/" Surely, we should set aside our differences, band together and fight this threat.
  36. C

    What's the reason for this epsilon? (about Schwinger effect)

    In Schwinger's classic http://dx.doi.org/10.1103/PhysRev.82.664" on pair production, he inserted an infinitesimal to get the desired pair production rate. (On page 13, he said: "We shall now simply remark that, to extend our results to pair-production fields, it is merely necessary to add an...
  37. P

    Reason Behind Structure of Equations

    First post! Hey people! I hope this isn't a topic already posted before. I already used the search function but I couldn't find the question I was looking for :/ Anyways, I was curious as to why equations in physics are set up the way they are. Let me show you what I mean: KE = ½mv²...
  38. J

    Causal structure of spacetime: intuitive reason for non-compactness?

    Apologies in advance if this has been asked and answered somewhere else, I searched but could not find anything. I just wanted to verify if my intuitive understanding of why space time (if it is to be physically plausible) can not be compact. According to Hawking and Ellis (and others)...
  39. R

    Objectivism is the philosophy of reason

    Objectivism deserves its own thread. For those of you who don't yet know, Objectivism is the philosophy of reason, and it includes metaphysics, epistemology, ethics and politics. If one recognizes the supremacy of reason and applies it consistently, the following follows: Metaphysics...
  40. bcrowell

    Most fundamental reason why boosts have to have L(-v)L(v)=I?

    This question may be one of those questions that is hard to talk about because it seems so obvious that a certain thing has to be a certain way that it becomes impossible to figure out how you know that it has to be that way. When you derive the Lorentz transformations from a certain set of...
  41. R

    Muons and Taus: Is There a Theoretical Reason They Decay So Rapidly?

    Are there any developed theories to explain why Muons and Taus decay so quickly, and why they don't stick around and leave us with x-ray emitting hydrogen atoms? It would be interesting if we could get them to last longer (I suppose relativistic speeds do, but that's still insignificant on the...
  42. R

    Possible simple reason for nuclear confinement and asymptotic freedom

    Dear all It is known that the ratio of the magnetic attraction to the static repulsion of two moving (similar) charges is in the ratio of (v/c)^2. A learned friend of mine tells me that this is relativistically correct also. When v is nearly c, the two forces are equal and we have an...
  43. W

    Reason a Dineutron is not bound?

    Hello, I am learning very, very basic quantum from the internet, and I have a question about the reason why dineutrons cannot exist. I know that the standard answer is that they aren't bound, but I don't understand why they are not, whereas a proton-electron system is. Here is the context in...
  44. M

    Any reason why we shouldn't be subjectively immortal?

    1. You can't think if you're dead. 2. Therefore you'll never think you're dead (and be right about it) 3. Therefore the subjective experience we will all have is that we never die. ("afterlife" is not death, just more life) As time goes on, we will always find that we're still alive -...
  45. C

    Is there any reason for tensor indices being ordered one way or the other?

    if I have an expression gca * dwab is there any reason for the resultant tensor should be dwcb vs. dwbc?
  46. V

    Whether light has mass? if yes what is the reason behind it?

    whether light has mass?if yes what is the reason behind it?
  47. M

    What is the reason for phase change of light on reflection from a denser medium?

    What is the explanation for the phase change of pie that occurs when a light ray gets reflected from an optically denser medium? This fact was demonstrated by the Llyod's mirror experiment, but what is the theoretical explanation for it? Thanks
  48. K

    The reason why the East fell behind the West

    The main reason why East Asia did not modernize before Europe is this. East Asians are holistic, they see the whole before the individual elements constituting it and we believed that the whole was more important than the individual. This led to the following belief that continuous scientific...
  49. H

    Evolutionary reason for 3-D extrapolation

    Can anyone explain why we humans have the innate ability to extrapolate 3-dimensional images from 2-dimensional images. I am not interested in how it works (i.e., how the brain accomplishes this feat). Instead, I would like to know why it was so important in the evolutionary process. In other...
  50. A

    News The reason you cant be flat footed in the military

    the reason you can't be flat footed in the military is because you have a lot of back, hip, and knee problems. I have wanted to join the military since i was a little kid. but recently i have just found out that i can't since i am flat footed. and that is the reason. I know for a fact because I...
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