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 Neurobiolo