I’m not sure, but I think LB and Dash might be talking about different things.
If I understand correctly, LB is starting with the assumption that the original fruit is assur but neither the first planted tree nor the tenth planted tree are definitely assur. That is what she is trying to figure out.
On the other hand, Dash seems to think that LB is assuming that the fruit from the planted tree (planted from the stolen fruit) is definitely assur. I think though that LB was talking about the original fruit when she wrote that it is definitely assur.
Am I understanding you correctly, LB?