Display goal.
Goals.
Match goal (written as "left == right" in notes).
Term goal.
Unification goal (written as "left ?= right" in notes).
The goal list stack.
The goal list stack. Each entry is a list of goals that are to be satisfied.
Interpret a query against the given program.
Rename count.
Rename count. Incremented each time rename is called so we get unique names each time.
Rename count.
Rename count. Incremented that each time rename is called so we get unique names each time.