import proveit
from proveit import defaults
from proveit.logic import Implies, Forall, Boolean
from proveit import PofA, QofA, P, A, Q
from proveit.logic import QimplPofTrue, QimplPofFalse, PofTrue, PofFalse
from proveit.logic.booleans import forall_over_bool_by_cases
theory = proveit.Theory() # the theorem's theory
%proving conditioned_forall_over_bool_by_cases
defaults.assumptions = (conditioned_forall_over_bool_by_cases.conditions +
conditioned_forall_over_bool_by_cases.instance_expr.conditions)
forall_over_bool_by_cases
forall_over_bool_by_cases_spec = forall_over_bool_by_cases.instantiate({PofA:Implies(QofA,PofA)})
QAimplPA = forall_over_bool_by_cases_spec.generalize((P, Q), conditions=forall_over_bool_by_cases_spec.assumptions)
QAimplPA.instantiate({P:P, Q:Q, A:A})
%qed