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Informal description: ""

{λ[a:Prop] .​ λ[ksi:Set] .​ λ[x:ksi] .​ λ[y:ksi] .​ λ[a1:a]} .​ <{(λ[t:ksi] .​ {(t) .​ (y) .​ (x) .​ (ksi) .​ (a)} .​ prop1 ) .​ (ksi)} .​ some > .​ {({(a1) .​ (y) .​ (x) .​ (ksi) .​ (a)} .​ t8 ) .​ (x) .​ (λ[t:ksi] .​ {(t) .​ (y) .​ (x) .​ (ksi) .​ (a)} .​ prop1 ) .​ (ksi)} .​ somei

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