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Informal description: ""

{λ[a:Prop] .​ λ[b:Prop] .​ λ[o:{(b) .​ (a)} .​ orec ]} .​ <{((b) .​ not ) .​ (a)} .​ iff > .​ {({({(o) .​ (b) .​ (a)} .​ orece1 ) .​ (b) .​ (a)} .​ comor ) .​ ({(o) .​ (b) .​ (a)} .​ orece2 ) .​ ((b) .​ not ) .​ (a)} .​ iffi

Validation parameters: sort hierarchy = "Z2", kernel options = ""