Thu, 19 Sep 2019 15:09:12 +0200 wenzelm clarified signature;
Thu, 19 Sep 2019 10:52:18 +0200 wenzelm clarified modules;
Wed, 18 Sep 2019 22:46:01 +0200 wenzelm support soft types for 'have' etc., with careful export wrt. result text to avoid extra assumptions (details may differ due to polymorphism);
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