DEFINITION or5_ind()
TYPE =
∀P0:Prop
.∀P1:Prop
.∀P2:Prop
.∀P3:Prop
.∀P4:Prop
.∀P:Prop
.P0→P
→(P1→P)→(P2→P)→(P3→P)→(P4→P)→(or5 P0 P1 P2 P3 P4)→P
BODY =
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