balloonian variable /n./ [Commodore users; perh. a deliberate
phonetic mangling of `boolean variable'?] Any variable that
doesn't actually hold or control state, but must nevertheless be
declared, checked, or set. A typical balloonian variable started
out as a flag attached to some environment feature that either
became obsolete or was planned but never implemented.
Compatibility concerns (or politics attached to same) may require
that such a flag be treated as though it were live.
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