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From: on behalf of Ed Boyden Sent: Tuesday, July 22, 2014 2:55 PM To: jeffrey E. Subject: Re: my guess is biological hash functions exist Sure... I guess I was thinking of this from a info theory standpoint, where if you can't recover the original, some info was discarded. But this is a tricky way to think. Best to stick to thinking about what one part of a network is computing, based upon what other parts of the networks will do with the signals received. On Tue, Jul 22, 2014 at 10:51 AM, jeffrey E. <[email protected]> wrote: > Not sure if discarding , as opposed to a function with a defined limit > output . > On Tuesday, July 22, 2014, Ed Boyden < wrote: » Absolutely! Computation means discarding information (e.g., sensory » information being transformed into a decision requires discarding » some of the info -- a passive photocopier does no computation), and a » hash is basically doing that, but a one-way function, and towards » some fixed length. I think that is probably the way brains error » check, no? » Best, » Ed » On Tue, Jul 22, 2014 at 9:04 AM, jeffrey E. <[email protected]> wrote: »> >» https://www.khanacademy.org/economics-finance-domain/core-finance/m >» oney-and-banki ng/bi tcoin/v/bitcoi n-cryptographic-hash-function »> » > -- » > please note >» The information contained in this communication is confidential, >» may be attorney-client privileged, may constitute inside >» information, and is intended only for the use of the addressee. It » > is the property of JEE Unauthorized use, disclosure or copying of >» this communication or any part thereof is strictly prohibited and >» may be unlawful. If you have received this communication in error, >» please notify us immediately by return e-mail or by e-mail to >» [email protected], and destroy this communication and all >» copies thereof, including all attachments. copyright -all rights >» reserved » -- » Ed Boyden, Ph. D. » Leader, Synthetic Neurobiology Group EFTA_R1_01765929 EFTA02586034 » Associate Professor, MIT Media Lab and McGovern Institute, » Departments of Biological Engineering and Brain and Cognitive » Sciences Co-Director, MIT Center for Neurobiological Engineering New » York Stem Cell Foundation-Robertson Investigator MIT, Room E15.421, » 20 Ames St., Cambridge, MA 02139 email - [email protected] office - » (617) 324-3085 cell - (650) 468-5625 fax - (617) 253-6285 skype - » eboyden3 web - http://syntheticneurobiology.org twitter - » http://twitter.com/eboyden3 > -- > please note > The information contained in this communication is confidential, may > be attorney-client privileged, may constitute inside information, and > is intended only for the use of the addressee. It is the property of > JEE Unauthorized use, disclosure or copying of this communication or > any part thereof is strictly prohibited and may be unlawful. If you > have received this communication in error, please notify us > immediately by return e-mail or by e-mail to [email protected], > and destroy this communication and all copies thereof, including all > attachments. copyright -all rights reserved Ed Boyden, Ph. D. Leader, Synthetic Neurobiology Group Associate Professor, MIT Media Lab and McGovern Institute, Departments of Biological Engineering and Brain and Cognitive Sciences Co-Director, MIT Center for Neurobiological Engineering New York Stem Cell Foundation-Robertson Investigator MIT, Room E15-421, 20 Ames St., Cambridge, MA 02139 email - [email protected] office - (617) 324-3085 cell - (650) 468.5625 fax - (617) 253.6285 skype eboyden3 web - http://syntheticneurobiology.org twitter - http://twitter.com/eboyden3 <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD KIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> alict> <key>conversation-idgkey> <integer>297250</integer> <key>date-last-viewed</key> <integer>0</integer> <key>date-received</key> <integer>1406040936</integer> <key>flags</key> <integer>8590195717</integer> <key>gmail-label-ids</key> <array> <integer>6</integer> <integer>2</integer> </array> <key>remote-id</key> <string>425878</string> 2 EFTA_R1_01765930 EFTA02586035 </dict> </plist> 3 EFTA_R1_01765931 EFTA02586036