\chapter{Quantum mechanical promises}

Probable connection to QM:

\beq
\hat b = promise~ body = operator observable.\\
+\pi = a generator promise (like \hat H)\\
-\pi = a measurement or trust, expectation \langle a|\hat -b | a \rangle\\
U(b) = measurement \langle a|\hat -b | a \rangle\\
\psi(\pi) = scope of prob. of finding promise by an agent.\\
\hat \tau |\psi\rangle = type\\
\hat \chi | \psi\rangle = body etc
\hat \sigma | \psi\rangle = scope
\eeq