Proof of proveit.logic.booleans.conjunction.some_from_and theorem

import proveit
theory = proveit.Theory() # the theorem's theory

%proving some_from_and

With these allowed/disallowed theorem/theory presumptions (e.g., to avoid circular dependencies), we begin our proof of
some_from_and:
(see dependencies)

some_from_and may now be readily provable (assuming required theorems are usable).  Simply execute "%qed".