Does an agent have "live" on a world???

[bleydorf]

All,
Does an agent have to "physically" exist on a give world?  That is if a
simulation create 1000 agents in a population, but only had room for 200
at a time, could they exist in limbo, until they were called into
existence by another agent/or schedule?  
Using my problem/solution simulation as an example, lets say a given
problem agent needed to carry 25 solutions, but only had space on the
display to display 8 of them, could the rest "exist" in limbo, until it
decided to drop them, display them, or whatever? 
 
Its kind of like the "if a tree falls in the forest..." If an agent
isn't observable, does it cease to exist? 

Thanks,
Brad.

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