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William K.
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Re: Modelling the real world
William K.   4/2/2013 5:20:49 PM
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I have always taken the expression "common sense" to mean things that are obvious to anyone except a fool. That is quite different from the expression referencing "conventional wisdom", or it's equvalent, "common thinking", which refelects the unverified assumptions that are usually based on sources less reliable than gossip. 

Common sense dictates that one would not stick a hand into the cutting area of a lawnmower, or stand on the very top of a folding ladder. Common sense is that wisdom that lawyers seem to dictate that it is not reasonable to expect their client to posess.

Ann R. Thryft
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Blogger
Re: Modelling the real world
Ann R. Thryft   4/2/2013 1:46:55 PM
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Thanks, I like those definitions.

Dave Palmer
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Platinum
Re: Modelling the real world
Dave Palmer   4/2/2013 1:43:15 PM
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@Ann: The Italian writer Antonio Gramsci drew a distinction between common sense and good sense.

To Gramsci, "common sense" meant the ruling ideology of a society: the ideas that are generally accepted without much critical thought.  As such, "common sense" is not universal, but may be radically different in different times and places (according to Gramsci, mainly depending on who's in charge).

"Good sense," on the other hand, requires critical thought.

"Common sense" might contain some elements of "good sense," but they are very different things.

Ann R. Thryft
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Blogger
Re: Modelling the real world
Ann R. Thryft   4/2/2013 12:46:17 PM
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Dave's comment about "intuitively obvious" makes me think of how many times I've been told that a certain practice is "common sense." My response is always "common to which group?" The term implies shared values and meanings, and shared assumptions about how the world does and should work. But these are not so common In a modern complex society.

Dave Palmer
User Rank
Platinum
Modelling the real world
Dave Palmer   4/1/2013 10:33:05 AM
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Another great article from Professor Craig.  The only part I take issue with is the claim that "the grey-box modelling approach is intuitive and obvious." First of all, our intuitions can often mislead us.  Read The Invisible Gorilla, by psychologists Chris Chabris and Dan Simons, for many instructive examples of everyday illusions.  Second, if these things were obvious, there would be no need for engineers... let along engineering professors!

On the subject of modelling the real world, take a look at Dan Meyer's blog.  Dan is a high school math teacher who gave a though-provoking TED Talk called Math Class Needs a Makeover.  Dan puts modelling at the center of his teaching.  It's an approach that can help prepare students to engage in engineering problem-solving.



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