# Summary of #hplusroadmap IRC Discussion (Sept 6, 2011)

* Utopiah shared a Kurzweil AI article titled "Achieving Substrate-Independent Minds: No, We Cannot Copy Brains," which appears to be a recent publication from the administrator of carboncopies.org, discussing limitations in brain copying technology.

* Participants discussed the potential applications of 3D printing for creating personalized pill boxes, which evolved into a creative conversation about designing Rube Goldberg-style mechanical pill dispensers with unnecessary but entertaining complexity.

* Kanzure referenced Drexler's "Kinematic Self-Replicating Machines" (KSRM) in the context of self-replicating mechanical systems, providing a link to molecularassembler.com/KSRM.htm.

* A brief discussion occurred about "sirtris," noting that Proctor & Gamble reportedly invested $750 million into resveratrol research through this company.

* A substantive technical discussion took place about Drexler's rod logic computers, with participants debating whether mechanical computing would become obsolete with graphene logic or whether its stability advantages might still make it valuable in certain contexts.

* Participants discussed the longevity and stability of different computing substrates, noting that the primary advantage of mechanical logic systems might be their generational stability rather than processing speed.