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Informal description: ""

{λ[sigma:Set] .​ λ[p:∀[x:sigma] .​ Prop] .​ λ[a1:{(p) .​ (sigma)} .​ amone ] .​ λ[s:{(p) .​ (sigma)} .​ some ]} .​ <{(p) .​ (sigma)} .​ one > .​ {(s) .​ (a1) .​ ({(p) .​ (sigma)} .​ some ) .​ ({(p) .​ (sigma)} .​ amone )} .​ andi

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