For early modern logicians like Arnauld (whose Port-Royal Logic was the best-known text of his day), it is a psychological entity like an "idea" or "concept".
对于早期的现代逻辑学家如Arnauld(他的《Port Royal逻辑》在过去某个时期是最周知的教科书)它是一个认知实体如“观念”或“概念”。