Last modified: 2013-11-04 15:02:08 UTC
On http://www.wikidata.org/wiki/Q838746 I managed to enter the same statement twice today (I have since reverted it). Either the UI or the underlying database should not allow the same statement to be made more than once, since numerous statements are logically equivalent. If I tell you that the author of 'Truth and Method' is Hans-Georg Gadamer, then I tell you again that the author of 'Truth and Method' is Hans-Georg Gadamer, I have taught you nothing new. Edits of this sort should fail.
I'm not sure this bug is relevant now given the presence of qualifiers. One use case that came up in a public forum was that we needed to specify that a particular building has been a distillery (or something of the sort) for two different periods of time. The only way to do that is to use the same statement twice, each statement using a qualifier as necessary. This should probably be handled in the constraints system we've set up, for very particular properties.
*** Bug 51365 has been marked as a duplicate of this bug. ***
I just wanted to inform everybody that my bot Sk!dbot removes double claims if they are exactly the same.
As Steven said we need to allow this because of qualifiers.
