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Merge pull request #457 from mdimjasevic/prop-well-typed-2

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Properties: fix 'well-typed' according to issue #318
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Philip Wadler 2020-01-26 13:23:55 -06:00 committed by GitHub
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@ -967,7 +967,7 @@ remaining. There are two possibilities:
+ Term `L` is a value, so we are done. We return the + Term `L` is a value, so we are done. We return the
trivial reduction sequence `L —↠ L`, evidence that `L` is trivial reduction sequence `L —↠ L`, evidence that `L` is
well-typed, and the evidence that `L` is a value. well typed, and the evidence that `L` is a value.
+ Term `L` steps to another term `M`. Preservation provides + Term `L` steps to another term `M`. Preservation provides
evidence that `M` is also well typed, and we recursively invoke evidence that `M` is also well typed, and we recursively invoke