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Informal description: ""

{λ[sigma:Set] .​ λ[p:∀[x:sigma] .​ Prop] .​ λ[s:{({(p) .​ (sigma)} .​ non ) .​ (sigma)} .​ some ] .​ λ[a1:{(p) .​ (sigma)} .​ all ]} .​ < con > .​ (λ[x:sigma] .​ {(x) .​ (a1) .​ (s) .​ (p) .​ (sigma)} .​ t3 ) .​ s

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