 Gehn's inability to grasp the fine aspects of the Art of Writing, leading him to copy or alter sentences from existing books rather than writing original passages, results in his Ages being unstable. Gehn tends to be unimaginative: besides having no talent for the Art, he merely numbers his Ages rather than naming them (Riven is his "Fifth Age", for instance), and as long as it will give him what he seeks, prefers to smash his way through D'ni puzzle locks made with delicate materials rather than figure them out.
