If you are performing a mitzvah, and then another mitzvah presents itself and you cannot do both, which one takes precedence? Do you abandon the current mitzvah and do the newer one, or do you perform the newer one and abandon the first one? The Talmud’s example is this: If you are involved in a funeral during, say, Chol Hamoed Succos, must you still eat in a succah at mealtime, or are you absolved from the mitzvah of succah?