Design 25 §7. A person is not a module and holds no seat: nothing is
addressed to them, nothing is delivered to them, and they have no durable
consumer. What they have is permission to ask, as a list of tools or `*`
for an administrator.
Four properties the tests hold it to, each of which is a way of being
wrong that would not announce itself: a person reaches nothing but tools,
so one cannot claim a module said something; no ack subject, because
authority over a consumer that does not exist is authority nobody would
audit; no allow_responses, because a person who can answer a request is
impersonating a module on a bus where anyone may serve a tool; and two
people do not share an inbox.
jschoubben
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