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Informal description: ""

{λ[sigma:Set] .​ λ[s0:(sigma) .​ set ] .​ λ[t0:(sigma) .​ set ] .​ λ[n:∀[x:sigma] .​ ∀[y:{(t0) .​ (x) .​ (sigma)} .​ esti ] .​ ({(s0) .​ (x) .​ (sigma)} .​ esti ) .​ not ]} .​ <{(t0) .​ (s0) .​ (sigma)} .​ disj > .​ λ[x:sigma] .​ {((x) .​ n) .​ ({(t0) .​ (x) .​ (sigma)} .​ esti ) .​ ({(s0) .​ (x) .​ (sigma)} .​ esti )} .​ th2

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