Second, he pointed out that there is increasing scientific evidence that adult stem cells may be as effective as embryonic stem cells, without having the same ethical implications. Apparently, it is a fact that the extreme versatility of embryonic stem cells makes them unpredictable and they cannot be relied on to develop as intended. Adult stem cells, on the other hand, which are further along the developmental chain, are believed to reduce that risk. Again, in The Irish Times a few days ago, Fr. Kevin Doran wrote: