[ExI] Feasibility of solid Dyson Sphere WAS mbrains again: request

[Dennis May]

Spike wrote:
 
> The MBrain is a target, in a sense, but certainly not a helpless target.  
> This one has a built-in speed of light self-defense system.
 
Been through all that kind of discussion before.  Whatever defenses
you build the resources outside to overcome them can be as large
as it takes.  Beams of diffuse anti-matter dust are my favorite.
 
Dennis May
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