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	,  ⊢
	: , : , :
1	theorem		⊢
	proveit.logic.booleans.disjunction.singular_constructive_dilemma
2	instantiation	7	⊢
	: , :
3	instantiation	7	⊢
	: , :
4	instantiation	8, 9	⊢
	:
5	deduction	10	⊢
6	deduction	11	⊢
7	axiom		⊢
	proveit.logic.equality.equality_in_bool
8	theorem		⊢
	proveit.logic.booleans.unfold_is_bool_explicit
9	assumption		⊢
10	instantiation	12, 15, 13	,  ⊢
	: , :
11	instantiation	14, 15, 16	,  ⊢
	: , :
12	theorem		⊢
	proveit.logic.booleans.disjunction.or_if_both
13	instantiation	17, 18	⊢
	:
14	theorem		⊢
	proveit.logic.booleans.disjunction.or_if_only_left
15	assumption		⊢
16	instantiation	19, 20	⊢
	:
17	axiom		⊢
	proveit.logic.booleans.eq_true_elim
18	assumption		⊢
19	theorem		⊢
	proveit.logic.booleans.negation.negation_intro
20	assumption		⊢