theorem Dictionary.instCoeContradictoryBeliefBelief._proof_1
theorem Dictionary.instCoeContradictoryBeliefBelief._proof_1: ∀ (v : mbdw2246.Dictionary.ContradictoryBelief), mbdw2246.Dictionary.Belief.Is (Subtype.val v)
theorem Dictionary.instCoeContradictoryBeliefBelief._proof_1
theorem Dictionary.instCoeContradictoryBeliefBelief._proof_1: ∀ (v : mbdw2246.Dictionary.ContradictoryBelief), mbdw2246.Dictionary.Belief.Is (Subtype.val v)