BQ78350 FCC vs reserve capacity vs update

Can you explain the relation between reserve capacity and full charge capacity when it comes to learning (FCC update)?

BQ78350 TRM section 8.1.9 states:
"The value of Reserve Capacity is subtracted from the learn capacity when determining the value of the reported FCC."

I am not sure what is "learn capacity".  That expression does not appear anywhere else in the document.

FCC does not include the reserve capacity because it initially matches the design capacity, which itself does not
include reserve capacity (or at least is recommended not to in section 8.1.1).
I am afraid that subtracting reserve capacity from FCC will lead to an error, unless "reported FCC" refers to some other parameter than FCC itself.

I am confused..

Regards,