How did the funerary rituals take place?

How can we explain these mysterious features? A number of suggestions have been put forward. It is agreed that they had some connection with the funerary cult of the Neolithic farmer population. One suggestion is that the deceased was first placed in the mortuary house, which was perhaps only a platform of wood. After a time, when there was nothing but the skeleton left, the bones were moved to one of the graves. Perhaps the grave goods of the deceased were left in the mortuary house, because it was thought that the deceased did not need them any more. It has also been suggested that the stone-packing graves, consisting of two graves and a mortuary house, represent family burials. After several family members had been buried, the platform was removed and the structures were covered with stones. Others believe that the two graves were for sacrificed oxen and that the mortuary house was the true grave.