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In our mishnah there is a difference of opinion concerning the visual signs of partly leavened bread. Rabbi Yehudah ben-Ilai says that when Tanna Kamma refers to partly leavened bread he means that when it comes out of the oven it has a crust with small cracks in it - cracks that look like the antennae of grasshoppers: two small cracks only in a kind of V-shape.
This leads us to ponder the use of the grasshopper for the shape of a crack and the function of its antennae.