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We show that assuming “”, any poset which increases does not preserve the truth of . We also show that in , any non-trivial poset on does not preserve the truth of . This answers the question of Chan and Jackson. Furthermore, we show that under the assumptions “” + “”, there is a poset on which adds a new subset of while preserving the truth of . This answers the question of Cunningham.

生成讲解博客的中文版本

生成AI智能校验的中文版本