Last week, an alarming complaint popped up from iPhone owners on Reddit and elsewhere: Old photos, long since deleted, had resurfaced in their Photos app. Vacations, nudes, concerts, all unexpectedly returned like an unwelcome Pet Sematary cat. Today Apple finally acknowledged the bug and pushed out a fix. But the incident underscores a forgotten truth of memories in the digital age. Deletion is a myth, or at the very least a little white lie.The firsthand stories about undead photos have been d...