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Informal description: ""

{λ[a:Prop] .​ λ[b:Prop] .​ λ[c:Prop] .​ λ[a1:{(b) .​ (a)} .​ and ] .​ λ[i:{(c) .​ (b)} .​ imp ]} .​ <{(c) .​ (a)} .​ and > .​ {(({(a1) .​ (b) .​ (a)} .​ ande2 ) .​ i) .​ ({(a1) .​ (b) .​ (a)} .​ ande1 ) .​ (c) .​ (a)} .​ andi

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