Talk:Logic

2nd nonconstructive complaint

I see that the article has a new, up-to-date reference for "Logic is the study of arguments", from the 2002 book by the Catholic philosopher, Harry Gensler, of the John Carroll University, a Jesuit theological college.

Modern Catholic teaching of logic has perhaps been unduly neglected in Wikiedpia's treatment of logic, but it is certainly not mainstream. What, precisely, is wrong with the definition in the Collins Encyclopedia, which was edited by the highly accomplished scholar, David Crystal? What is the attraction of this offbeat definition of logic, that we have to spend so much effort furnishing it with references? Is Harry Gensler really being held up as such a great authority that can tell us that Tarski's characterisation of logic as concerning non-subject specific consequence has been overturned?

Perhaps this article will attract attention from a competent editor who can see beyond their personal views on what logic is, and see how experts use the term. Until then, look out for my 3rd nonconstructive complaint. — Charles Stewart (talk) 10:12, 26 October 2010 (UTC)

Logic-the tool.

I propose that the description of Logic should be fundamentally altered. To say that logic is 'the tool for distinguishing between the true and the falce' is to say that there is an observer who uses 'the tool' to judge what is true and what is falce. This does not say what that 'tool' is. That which is observed in the observers consciousness in the 'now' is a static picture. Using logic the observer, under the influence of motivation, alters that picture for another picture in the next 'now'. The change occurs in time. Both pictures are static at the time of observation. What is it that directed the alteration of the first picture to the second picture ? The observed picture in the first 'now' consists of parts. Each part is an independent truth defining the whole of the picture. The same applies to the picture in the second 'now', after change. Some of the truths of the description are common for pictures in both observations. The more of the truths of the description are common the stronger is the logical connection. Logic is like magnet. It has variable strength depending on how many truths about the two interacting pictures are common. KK (78.146.68.198 (talk) 13:24, 13 March 2011 (UTC))

Disambiguation talk

I think some of the comments have been moved I found an old contribution in the talk page of the disambiguation, but I amsure it was originally written on the main article. Can someone please explain, in their own words, the history of the article and what happened? Kathybramley (talk) 06:23, 27 March 2011 (UTC) This is my text from the disambiguation talk page: What about logic in the more everyday use in speech? When someone, like a doctor, suggests you are not as logical as you think, what do they mean? What exactly? How can you challenge or assess that? I'm not sure the mere mention of cognitive psychology really covers it, not from a user-friendly way. I imagine people using this page to get ideas if the word 'logic' has come up as an accusation of lacking it. What about logic and logical structure in essay writing/general academic writing? (I was always getting comments 'could be more logically structured' through school up to degree, but never once did anyone describe 'logical'). It is in this case, logical structure is equating to outline structure - starting with a distilled strong central/over-arching idea and 'exploding' it into constituent parts in a step-by-step fashion. I want a link from this page to an appropriate page. I'd like it for both these instances of important areas of use that are not yet included. ...not sure I am brave enough to yet though (quite a new user I am). Ideas and help? Comments? Kathybramley (talk) 19:06, 19 April 2009 (UTC) Kathybramley (talk) 06:23, 27 March 2011 (UTC)

Induction as Logic?

I think that in general, inductive reasoning is not considered logic; that is purely restricted to deductive reasoning. Inductive reasoning commits the inductive fallacy and is illogical. To give an example of inductive reasoning and why it is flawed, consider the following example: a hen who is fed and taken care of by a farmer day after day. The hen could inductively conclude, that the farmer will continue to do so based on this observation, corresponding to a premise in deductive reasoning. However, one day the hen is butchered by the farmer and fed to the family. Clearly the conclusion the hen came to was flawed -- it assumed constancy in the universe. This is the flaw of induction and why it should not be compared so closely with deduction. This article should be edited to express that. MONODA (talk) 10:19, 3 May 2011 (UTC) Dear MONODA...your hen pretended to know the future. Logic deals with the relationship between two static pictures in the 'now'. KK (78.146.69.242 (talk) 22:27, 3 February 2012 (UTC))

"Logic garnet"

A new user has added an intriguing picture of a so-called "logic garnet", claiming that it's an "early device used to determine the logical consistency of a given claim". We don't have any article directly on this, but we do have one on Shea Zellweger, who seems to be the inventor. Zellweger was born in 1925, so the thing can't be that "early" really.

I don't mind the picture, and a mention, somewhere in the article, but I'm not sure that an idiosyncratic notation deserves to be placed so prominently at the top. There are lots of notational systems that have accumulated followings of devoted fans but never really caught on in the wider world (e.g. Sheffer stroke, Laws of Form). --Trovatore (talk) 20:11, 3 September 2011 (UTC)