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	⊢
	:
1	axiom		⊢
	proveit.logic.booleans.negation.operand_is_bool
2	instantiation	3, 4	⊢
	:
3	theorem		⊢
	proveit.logic.booleans.in_bool_if_true
4	assumption		⊢