Tue, 09 Jun 2015 15:28:06 +0200 wenzelm eliminated dead code;
Tue, 09 Jun 2015 13:42:58 +0200 wenzelm clarified abstracted term bindings (again, see c8384ff11711);
Tue, 09 Jun 2015 12:32:01 +0200 wenzelm tuned signature;
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