Two more early uses were specification of a general expression and explaining the difference between an explicit textual statement and what only appears to follow from it.
A general instruction and an exception can coexist. The exception clarifies which cases fall under the general instruction; it does not necessarily abolish that instruction in all other cases.
Reconciliation preserves the evidentiary force of both passages wherever their meanings allow it. Technical abrogation becomes relevant when genuine legal incompatibility remains and the subsequent proof can be established.