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The dispute
R. Yehuda holds muktzeh and nolad apply; R. Shimon is lenient on most muktzeh. On Shabbat the ruling generally follows R. Shimon (Shabbat קנ״ו ע״ב (156b)), but regarding nolad the SA is strict (OC 322:1; 495:4 for Yom Tov).
ביצה שנולדה
An egg laid on Shabbat is forbidden that day (Beitzah ב ע״א (2a)).