The DECISIONS section consists of variable-action pairs, where the action is
evaluated and its value assigned to the variable. That variable may then be used in
subsequent actions in the step. The variables assigned values in the KNOWNS
section may also be used. Arithmetic expressions use prefix operators. The function
VALUE+ returns the value plus the positive tolerance of the value, and consequently
provides the largest magnitude for that length. There are many other functions
available.
There are two distinguished variable names. One is REPLY, the other
COMMENT. A comment acts as a dummy assignment and expects a string of text as
the "action" ...
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