Sentient Structure

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A sentient structure is a structure or part of headspace that is isolated in its ability to be sentient, instead of it being the entire headspace.

A non-sentient headspace may have multiple sentient structures and isolated patches of sentience.

Subterm
Sanctuary is a structure that protects headmates from a hostile headspace.

Related Terms
A non-sentient structure refers to a structure that is not sentient.