[ BlockLemma
    ( SourcePos
        { sourceName = "test/examples/prooffix.tex"
        , sourceLine = Pos 1
        , sourceColumn = Pos 1
        }
    )
    ( Marker "assumetest" )
    ( Lemma []
        ( SymbolicQuantified Universally
            ( NamedVar "x" :| [] ) Unbounded Nothing
            ( StmtFormula
                ( FormulaChain
                    ( ChainBase
                        ( ExprVar
                            ( NamedVar "x" ) :| []
                        ) Positive
                        ( RelationSymbol
                            ( Symbol "=" )
                        ) []
                        ( ExprVar
                            ( NamedVar "x" ) :| []
                        )
                    )
                )
            )
        )
    )
, BlockProof
    ( SourcePos
        { sourceName = "test/examples/prooffix.tex"
        , sourceLine = Pos 4
        , sourceColumn = Pos 1
        }
    )
    ( FixSymbolic
        ( NamedVar "x" :| [] ) Unbounded
        ( Have Nothing
            ( StmtFormula
                ( FormulaChain
                    ( ChainBase
                        ( ExprVar
                            ( NamedVar "x" ) :| []
                        ) Positive
                        ( RelationSymbol
                            ( Symbol "=" )
                        ) []
                        ( ExprVar
                            ( NamedVar "x" ) :| []
                        )
                    )
                )
            ) JustificationEmpty ( Qed JustificationEmpty )
        )
    )
]