Gnomic Cretenism. This is a very rare syndrome occuring only among Gnomelets. The constant use of a Gnomelet's brain for trifling purposes makes the items of knowledge stored there feel unwell. They commit mass suicide by diving into the so-called Lake of Oblivion, a cerebral area found in Bollogg's brains as well as in those of Gnomelets. The resulting gaps in a Gnomelet's education steadily increase until its brain becomes a complete intellectual vacuum.