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| author |  Samuel Mimram <smimram@debian.org> | 2006-11-21 21:38:49 +0000 |
|---|---|---|
| committer | Samuel Mimram <smimram@debian.org> | 2006-11-21 21:38:49 +0000 |
| commit | 70b9be8acc1d1ada178a95c1cd4013506e9d0d1b (patch) | |
| tree | f672a286d962cc67c95874b3b60402fc957870b6 /test-suite/failure/proofirrelevance.v | |
| parent | a5bd4e097a94cc4f863bf4d4bcc5ce592c30ba47 (diff) | |
| parent | 208a0f7bfa5249f9795e6e225f309cbe715c0fad (diff) | |
Merge commit 'upstream/8.1.gamma' into 8.1
Diffstat (limited to 'test-suite/failure/proofirrelevance.v')
| -rw-r--r-- | test-suite/failure/proofirrelevance.v | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/test-suite/failure/proofirrelevance.v b/test-suite/failure/proofirrelevance.v new file mode 100644 index 00000000..eedf2612 --- /dev/null +++ b/test-suite/failure/proofirrelevance.v @@ -0,0 +1,11 @@ +(* This was working in version 8.1beta (bug in the Sort-polymorphism + of inductive types), but this is inconsistent with classical logic + in Prop *) + +Inductive bool_in_prop : Type := hide : bool -> bool_in_prop +with bool : Type := true : bool | false : bool. + +Lemma not_proof_irrelevance : ~ forall (P:Prop) (p p':P), p=p'. +intro H; pose proof (H bool_in_prop (hide true) (hide false)); discriminate. +Qed. + |