Discussion of what logic is and is not?


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Message boards : Science (non-SETI) : Discussion of what logic is and is not?

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Profile Chris SProject donor
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Message 1359255 - Posted: 21 Apr 2013, 8:53:29 UTC

only the logic that the earth doesn't spin or wee would all fly off ???

I see the gravity of your remark!

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Message 1359436 - Posted: 21 Apr 2013, 17:12:14 UTC - in response to Message 1359170.

The lack of comments on this topic tells me that this subject is of little use to the majority of the posters on these boards. Many post with no clear methodology on how they reached their conclusions.
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Message 1359559 - Posted: 21 Apr 2013, 23:20:25 UTC - in response to Message 1359436.

The lack of comments on this topic tells me that this subject is of little use to the majority of the posters on these boards. Many post with no clear methodology on how they reached their conclusions.


I'd say it's not whether it is of use or not, but not realizing the usefulness.

(I also think even those of us applying logic cannot claim to be doing so all the time.)

I do wish those responding to I.D. has joined. Maybe the problem is that the thread where this came up is not visible. Frankly, I do not know what caused that; probably only one post towards the end needed to be hidden. But, I'd better say no more than that.

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Message 1359763 - Posted: 22 Apr 2013, 10:59:04 UTC

"Logic is considering various parameters, and using rational thought processes, coming to a considered conclusion".

But I'll chuck a spanner in the works - If certain scientists hadn't thought "outside the box" we wouldn't have discovered some of the breakthroughs that we have done. So secondary question - what about fuzzy logic and Chaos Theory? is plain logic always the best thing?


I posted this at the beginning, never got a response, at least not one that I saw.

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Message 1359983 - Posted: 22 Apr 2013, 19:46:06 UTC - in response to Message 1359763.

"Logic is considering various parameters, and using rational thought processes, coming to a considered conclusion".

But I'll chuck a spanner in the works - If certain scientists hadn't thought "outside the box" we wouldn't have discovered some of the breakthroughs that we have done. So secondary question - what about fuzzy logic and Chaos Theory? is plain logic always the best thing?


I posted this at the beginning, never got a response, at least not one that I saw.


No, there was no response. Please define "fuzzy logic".

Chaos theory can be thought of, one level, as a branch of geometry that deals with self-similarity. (This is an oversimplification, but will do.) I know of no ways in which Chaos Theory lies outside the rest of mathematics and its use axiomatic reasoning.

However, "is [using] plain logic always the best thing"?
I'd say outside of philosophy and mathematics, we're all using something else as well. Still, in political and scientific debates such as what takes place here, not knowing the logical basis leads to easily torn apart posts.

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Message 1360304 - Posted: 23 Apr 2013, 12:52:46 UTC

Please define "fuzzy logic".


Fuzzy logic is a form of many-valued logic or probabilistic logic; it deals with reasoning that is approximate rather than fixed and exact. Compared to traditional binary sets (where variables may take on true or false values) fuzzy logic variables may have a truth value that ranges in degree between 0 and 1. Fuzzy logic has been extended to handle the concept of partial truth, where the truth value may range between completely true and completely false. Furthermore, when linguistic variables are used, these degrees may be managed by specific functions.

It's all too cerebral for me Sarge, but you did ask! What is disconcerting is that modern washing machines apparently have it ....

Fuzzy Logic



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Message 1360337 - Posted: 23 Apr 2013, 15:02:13 UTC - in response to Message 1360304.

Also cameras, not only digital ones. My Yashica with a Zeiss Tessar lens has fuzzy logic.
Tullio
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Message 1360437 - Posted: 24 Apr 2013, 0:56:17 UTC - in response to Message 1360304.

It is perhaps a poor name? If it relies on probability, then I am willing to bet there's a completely logically foundation for fuzzy logic, which in turn relies on the axiomatic set up on probability I already mentioned.

There is only one way in which I came anywhere close to fuzzy logic of which I am aware. A prof had handed off to me something he had not been able to completely solve. He thought it would only get to a certain point and then would have to go off into something probabilistic. (We knew we could not determine the number of some things completely and why. But, I was able to show him that through a change in perspective we could determine it concretely with only one thing unknown, eliminating the need for probabilistic solutions.)

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Message 1360452 - Posted: 24 Apr 2013, 2:51:45 UTC

Errr, completely logical.

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Message 1360896 - Posted: 25 Apr 2013, 4:05:45 UTC

Course run.

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Message boards : Science (non-SETI) : Discussion of what logic is and is not?

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