[HPforGrownups] A Possible Horcrux?

[Alice Sanborn]

No: HPFGUIDX 150953

Please don't shoot me, but I have had a wild idea about Gryffindor's horcrux.  I wonder sometimes if it's not the pensive in Dumbledor's office.  Obviously no cannon, real or otherwise, to back this up, and I can't find where  this has been put forth as a possibility (altho, I'm sure I could well be overlooking a Lot of material, both in the books and in the postings). 

"Alice Sanborn"