我们曾就 阿约 所教讨论过这个难处:两位拉比来到两处、一到这里一到那里,人放两个 合界、打算到安息日再决定去听哪一堂,这有何不同,拉比犹大 为何说不可?是因他以为没有回溯的指定。然而若是这样,第一种情形也一样——只来一位拉比,但讲学之处安息日前不知,人在东西两边放了 合界——就该说两个都无效,因拉比在哪里要到安息日才知道,而没有回溯的指定。
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而我们曾就 阿约 的这条教导讨论过以下的难处:两位拉比来到两个地方,一位在这里、另一位在那里,而人放了两个 合界,打算在安息日决定他要去听哪一堂课,这个情形有什么不同?
And we discussed the following difficulty with regard to this teaching of Ayo: What is different about the case where two rabbis are coming to the two locations, one here and the other there, and one places two eiruvin, planning to decide on Shabbat which lecture he will attend?
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为什么 拉比犹大 说这不可以做?
Why did Rabbi Yehuda state that this may not be done?
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是因为他以为没有回溯的指定。
It is because he held that there is no retroactive designation.
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然而若是这样,在第一种情形也一样——只有一位拉比来,但他讲课的地点在安息日前不知道,而人在东边与西边都放了 合界——我们也应当说两个都无效,因为拉比的地点要到安息日才会知道,而又没有回溯的指定。
But if so, in the first case as well, where only one rabbi comes, but the location of his lecture was not known before Shabbat, and one placed eiruvin in the east and the west, we should say that neither is effective because the rabbi’s location will not be known until Shabbat, and there is no retroactive designation.