Proof by Division into Cases is a valid form of #202205062050. As the name suggests, the proof can be done if we exhausted all possible cases and all of them come up with the same 202204281244. This will be shown below:
$$ \begin{align} &p \lor q \\ &p \rightarrow r \\ &q \rightarrow r \\ \therefore \ &r \end{align} $$