ludicrousness
1. Kant felt that joke-telling relies on building up a psychic tension which is safely punctured by the ludicrousness of the punchline.
坎特认为笑话讲究先逐步累积一种心理压力,然后利用包袱中的荒唐滑稽将这种压力健康地释放出来.
2. by the ludicrousness of the punchline.
道出了题目的意思。