Proof of proveit.logic.equality.contradiction_via_falsification theorem

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

%proving contradiction_via_falsification

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

%qed

proveit.logic.equality.contradiction_via_falsification has been proven.

	step type	requirements	statement
0	generalization	1	⊢
1	instantiation	2, 3, 4	,  ⊢
	:
2	conjecture		⊢
	proveit.logic.booleans.negation.negation_contradiction
3	assumption		⊢
4	instantiation	5, 6	⊢
	:
5	theorem		⊢
	proveit.logic.booleans.negation.negation_intro
6	assumption		⊢