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Diffstat (limited to 'theories/Logic/ClassicalUniqueChoice.v')
| -rw-r--r-- | theories/Logic/ClassicalUniqueChoice.v | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/theories/Logic/ClassicalUniqueChoice.v b/theories/Logic/ClassicalUniqueChoice.v index 28d32fcc..bb846aa6 100644 --- a/theories/Logic/ClassicalUniqueChoice.v +++ b/theories/Logic/ClassicalUniqueChoice.v @@ -6,9 +6,13 @@ (* * GNU Lesser General Public License Version 2.1 *) (************************************************************************) -(*i $Id: ClassicalUniqueChoice.v 9026 2006-07-06 15:16:20Z herbelin $ i*) +(*i $Id: ClassicalUniqueChoice.v 10170 2007-10-03 14:41:25Z herbelin $ i*) -(** This file provides classical logic and unique choice *) +(** This file provides classical logic and unique choice; this is + weaker than providing iota operator and classical logic as the + definite descriptions provided by the axiom of unique choice can + be used only in a propositional context (especially, they cannot + be used to build functions outside the scope of a theorem proof) *) (** Classical logic and unique choice, as shown in [ChicliPottierSimpson02], implies the double-negation of |