Show the Proof

import proveit
# Automation is not needed when only showing a stored proof:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%show_proof

	step type	requirements	statement
0	instantiation	1, 2, 3, 4, 5, 6, 7, 8	, , , , , ,  ⊢
	: , : , : , :
1	theorem		⊢
	proveit.logic.booleans.disjunction.constructive_dilemma
2	instantiation	11, 9	⊢
	:
3	instantiation	11, 10	⊢
	:
4	instantiation	11, 13	⊢
	:
5	instantiation	11, 16	⊢
	:
6	assumption		⊢
7	instantiation	14, 12, 13	,  ⊢
	: , :
8	instantiation	14, 15, 16	,  ⊢
	: , :
9	assumption		⊢
10	assumption		⊢
11	theorem		⊢
	proveit.logic.booleans.negation.closure
12	assumption		⊢
13	assumption		⊢
14	theorem		⊢
	proveit.logic.booleans.implication.to_contraposition
15	assumption		⊢
16	assumption		⊢