Version 1 of #1736

Veritula implements a recursive epistemology. For a criticism to be outstanding, it can’t have any outstanding criticisms itself, and so on, in a deeply nested fashion.

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def criticized? idea
  outstanding_criticisms(idea).any?
end

def outstanding_criticisms idea
  criticisms(idea).filter { |c| outstanding_criticisms(c).none? }
end

def criticisms idea
  children(idea).filter(&:criticism?)
end

This approach is different from non-recursive epistemologies, which handle criticisms differently. For example, they might not consider deeply nested criticisms when determining whether an idea is currently criticized.