[ BlockDefn
    ( Location
        { locFile = "test/examples/russell.tex"
        , locLine = 1
        , locColumn = 1
        }
    ) Nothing
    ( Marker "universal_set" )
    ( Defn []
        ( DefnAdj
            ( Just NounPhrase ( [] )
                ( Noun
                    ( Location
                        { locFile = "test/examples/russell.tex"
                        , locLine = 2
                        , locColumn = 7
                        }
                    )
                    ( LexicalItemSgPl
                        ( SgPl
                            { sg = TokenCons
                                ( Word "set" ) End
                            , pl = TokenCons
                                ( Word "sets" ) End
                            }
                        )
                        ( Marker "set" )
                    ) []
                ) ( Nothing ) ( [] ) ( Nothing )
            )
            ( NamedVar "V" )
            ( Adj
                ( Location
                    { locFile = "test/examples/russell.tex"
                    , locLine = 2
                    , locColumn = 18
                    }
                )
                ( LexicalItem
                    ( TokenCons
                        ( Word "universal" ) End
                    )
                    ( Marker "universal_set" )
                ) []
            )
        )
        ( StmtQuantPhrase
            { loc = Location
                { locFile = "test/examples/russell.tex"
                , locLine = 4
                , locColumn = 5
                }
            , qp = QuantPhrase Universally NounPhrase ( [] )
                ( Noun
                    ( Location
                        { locFile = "test/examples/russell.tex"
                        , locLine = 4
                        , locColumn = 13
                        }
                    )
                    ( LexicalItemSgPl
                        ( SgPl
                            { sg = TokenCons
                                ( Word "set" ) End
                            , pl = TokenCons
                                ( Word "sets" ) End
                            }
                        )
                        ( Marker "set" )
                    ) []
                )
                (
                    [ NamedVar "x" ]
                ) ( [] ) ( Nothing )
            , stmt = StmtFormula
                { formula = FormulaChain
                    ( ChainBase
                        ( ExprVar
                            ( NamedVar "x" ) :| []
                        ) Positive
                        ( Relation
                            ( Location
                                { locFile = "test/examples/russell.tex"
                                , locLine = 4
                                , locColumn = 32
                                }
                            )
                            ( RelationSymbol
                                ( Command "in" )
                                ( ParameterArity 0 )
                                ( Marker "elem" )
                            ) []
                        )
                        ( ExprVar
                            ( NamedVar "V" ) :| []
                        )
                    )
                }
            }
        )
    )
, BlockClaim Theorem
    ( Location
        { locFile = "test/examples/russell.tex"
        , locLine = 7
        , locColumn = 1
        }
    ) Nothing
    ( Marker "no_universal_set" )
    ( Claim []
        ( StmtNeg
            { loc = Location
                { locFile = "test/examples/russell.tex"
                , locLine = 8
                , locColumn = 18
                }
            , stmt = StmtExists
                { loc = Location
                    { locFile = "test/examples/russell.tex"
                    , locLine = 8
                    , locColumn = 18
                    }
                , np = NounPhrase
                    (
                        [ AdjL
                            ( Location
                                { locFile = "test/examples/russell.tex"
                                , locLine = 8
                                , locColumn = 21
                                }
                            )
                            ( LexicalItem
                                ( TokenCons
                                    ( Word "universal" ) End
                                )
                                ( Marker "universal_set" )
                            ) []
                        ]
                    )
                    ( Noun
                        ( Location
                            { locFile = "test/examples/russell.tex"
                            , locLine = 8
                            , locColumn = 31
                            }
                        )
                        ( LexicalItemSgPl
                            ( SgPl
                                { sg = TokenCons
                                    ( Word "set" ) End
                                , pl = TokenCons
                                    ( Word "sets" ) End
                                }
                            )
                            ( Marker "set" )
                        ) []
                    ) ( [] ) ( [] ) ( Nothing )
                }
            }
        )
    )
, BlockProof
    ( Location
        { locFile = "test/examples/russell.tex"
        , locLine = 10
        , locColumn = 1
        }
    )
    ( ByContradiction
        ( Location
            { locFile = "test/examples/russell.tex"
            , locLine = 11
            , locColumn = 5
            }
        )
        ( TakeNoun
            ( Location
                { locFile = "test/examples/russell.tex"
                , locLine = 12
                , locColumn = 5
                }
            ) NounPhrase
            (
                [ AdjL
                    ( Location
                        { locFile = "test/examples/russell.tex"
                        , locLine = 12
                        , locColumn = 12
                        }
                    )
                    ( LexicalItem
                        ( TokenCons
                            ( Word "universal" ) End
                        )
                        ( Marker "universal_set" )
                    ) []
                ]
            )
            ( Noun
                ( Location
                    { locFile = "test/examples/russell.tex"
                    , locLine = 12
                    , locColumn = 22
                    }
                )
                ( LexicalItemSgPl
                    ( SgPl
                        { sg = TokenCons
                            ( Word "set" ) End
                        , pl = TokenCons
                            ( Word "sets" ) End
                        }
                    )
                    ( Marker "set" )
                ) []
            )
            (
                [ NamedVar "V" ]
            ) ( [] ) ( Nothing ) JustificationEmpty
            ( Define
                ( Location
                    { locFile = "test/examples/russell.tex"
                    , locLine = 13
                    , locColumn = 5
                    }
                )
                ( NamedVar "R" )
                ( ExprSep
                    ( Location
                        { locFile = "test/examples/russell.tex"
                        , locLine = 13
                        , locColumn = 14
                        }
                    )
                    ( NamedVar "x" )
                    ( ExprVar
                        ( NamedVar "V" )
                    )
                    ( StmtFormula
                        { formula = FormulaChain
                            ( ChainBase
                                ( ExprVar
                                    ( NamedVar "x" ) :| []
                                ) Negative
                                ( Relation
                                    ( Location
                                        { locFile = "test/examples/russell.tex"
                                        , locLine = 13
                                        , locColumn = 34
                                        }
                                    )
                                    ( RelationSymbol
                                        ( Command "in" )
                                        ( ParameterArity 0 )
                                        ( Marker "elem" )
                                    ) []
                                )
                                ( ExprVar
                                    ( NamedVar "x" ) :| []
                                )
                            )
                        }
                    )
                )
                ( Have
                    ( Location
                        { locFile = "test/examples/russell.tex"
                        , locLine = 14
                        , locColumn = 5
                        }
                    ) Nothing
                    ( StmtConnected
                        { conn = Equivalence
                        , mloc = Nothing
                        , stmt1 = StmtFormula
                            { formula = FormulaChain
                                ( ChainBase
                                    ( ExprVar
                                        ( NamedVar "R" ) :| []
                                    ) Positive
                                    ( Relation
                                        ( Location
                                            { locFile = "test/examples/russell.tex"
                                            , locLine = 14
                                            , locColumn = 12
                                            }
                                        )
                                        ( RelationSymbol
                                            ( Command "in" )
                                            ( ParameterArity 0 )
                                            ( Marker "elem" )
                                        ) []
                                    )
                                    ( ExprVar
                                        ( NamedVar "R" ) :| []
                                    )
                                )
                            }
                        , stmt2 = StmtFormula
                            { formula = FormulaChain
                                ( ChainBase
                                    ( ExprVar
                                        ( NamedVar "R" ) :| []
                                    ) Negative
                                    ( Relation
                                        ( Location
                                            { locFile = "test/examples/russell.tex"
                                            , locLine = 14
                                            , locColumn = 29
                                            }
                                        )
                                        ( RelationSymbol
                                            ( Command "in" )
                                            ( ParameterArity 0 )
                                            ( Marker "elem" )
                                        ) []
                                    )
                                    ( ExprVar
                                        ( NamedVar "R" ) :| []
                                    )
                                )
                            }
                        }
                    ) JustificationEmpty
                    ( Contradiction
                        ( Location
                            { locFile = "test/examples/russell.tex"
                            , locLine = 15
                            , locColumn = 5
                            }
                        ) JustificationEmpty
                    )
                )
            )
        )
    )
    ( Location
        { locFile = "test/examples/russell.tex"
        , locLine = 16
        , locColumn = 1
        }
    )
]