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*To*: "eXtended Mind, Culture, Activity" <xmca@weber.ucsd.edu>*Subject*: Re: [xmca] a minus times a plus*From*: Jay Lemke <jaylemke@umich.edu>*Date*: Sun, 3 May 2009 17:43:02 +0200*Delivered-to*: xmca@weber.ucsd.edu*Domainkey-signature*: a=rsa-sha1; s=2007001; d=ucsd.edu; c=simple; q=dns; b=EB1aq57Y8NfDsvgQNZE2hW3vqxRYXWL9lUx5D+2UfqeekbERgcxJdp/IYCQEbJtmW JzrBruBjnXwgId+2Lyw1w==*In-reply-to*: <14a6419f0905022233t5e11aa44i5ddbf5711481f3fd@mail.gmail.com>*List-archive*: <http://dss.ucsd.edu/mailman/private/xmca>*List-help*: <mailto:xmca-request@weber.ucsd.edu?subject=help>*List-id*: "eXtended Mind, Culture, Activity" <xmca.weber.ucsd.edu>*List-post*: <mailto:xmca@weber.ucsd.edu>*List-subscribe*: <http://dss.ucsd.edu/mailman/listinfo/xmca>, <mailto:xmca-request@weber.ucsd.edu?subject=subscribe>*List-unsubscribe*: <http://dss.ucsd.edu/mailman/listinfo/xmca>, <mailto:xmca-request@weber.ucsd.edu?subject=unsubscribe>*References*: <384808.62393.qm@web110310.mail.gq1.yahoo.com> <30364f990904300839g29d5f7dbh3c016e17ed25bfa0@mail.gmail.com> <49FA50CE.1030102@mira.net> <731CECC23FB8CA4E9127BD399744D1EC018B6AA3@email001.lsu.edu> <14a6419f0904302015x4418174cm7f8a835049d83d9a@mail.gmail.com> <731CECC23FB8CA4E9127BD399744D1EC018B6AB2@email001.lsu.edu> <14a6419f0905011246l70e7a63ck66134f5fe0011f87@mail.gmail.com> <731CECC23FB8CA4E9127BD399744D1EC018B6BD5@email001.lsu.edu> <14a6419f0905021213ncb88568vd6fc71abf1614c12@mail.gmail.com> <E0584F84-9159-4E06-9B53-C6130F59CD5E@umich.edu> <14a6419f0905022233t5e11aa44i5ddbf5711481f3fd@mail.gmail.com>*Reply-to*: "eXtended Mind, Culture, Activity" <xmca@weber.ucsd.edu>*Sender*: xmca-bounces@weber.ucsd.edu

Thanks for the wonderful picture! Will take a closer look.

JAY. Jay Lemke Professor Educational Studies University of Michigan Ann Arbor, MI 48109 www.umich.edu/~jaylemke On May 3, 2009, at 7:33 AM, Ng Foo Keong wrote:

Jay Lemke wroteThis idea of organizing all the representations, or realizations in Sfard's terms, of the system of the integers into one coherent scheme is of course attractive. But we should ask WHY it is attractive? and to whom? Culturally it has been argued in our recent history, by postmodernists, that such Master Narratives are part and parcel of a particular ideology. ...I thought it's just a child's natural curiosity (instinct?) to try to make sense of the world. Maybe when people grow up, they get more erm ... complicated. What do we tell the child then? "Shut up! and calculate!" like we tell the physicists? Jay Lemke wroteForgive me, but I find myself nearing the limits of language as amediumhere. I need some pictures, if not an animation!What ever happened to the plans for a next-generation xmca where wecouldhave more than text??But still, somebody has to do the donkey work of hanging the bell onthecat. OK, OK, I get the hint. do, do, do, doodledy dooooo. ... converting to pdf ... trying to attach it to this message ... did you guys "get it"?<Negative timesNegative.pdf>_______________________________________________xmca mailing list xmca@weber.ucsd.edu http://dss.ucsd.edu/mailman/listinfo/xmca

**References**:**RE: [xmca] a minus times a plus***From:*"David H Kirshner" <dkirsh@lsu.edu>

**Re: [xmca] a minus times a plus***From:*Ng Foo Keong <lefouque@gmail.com>

**RE: [xmca] a minus times a plus***From:*"David H Kirshner" <dkirsh@lsu.edu>

**Re: [xmca] a minus times a plus***From:*Ng Foo Keong <lefouque@gmail.com>

**Re: [xmca] a minus times a plus***From:*Jay Lemke <jaylemke@umich.edu>

**Re: [xmca] a minus times a plus***From:*Ng Foo Keong <lefouque@gmail.com>

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