Originally Posted by
dberrie2000
How does the presence of a seer stone somehow cover up or cancel out the fact Joseph Smith also was in possession of the Urim and Thummim?
As Joseph Smith testified to--he started out using the Urim and Thummim--but it was very cumbersome to bear--and the translation could only be conducted in a short spurts at a time, as he tired of the weight quickly.
As Joseph Smith's skills increased, he found he could use other objects, such as a seer stone--to receive revelation in the translation process, which accelerated the translation process. He later found he could use his own mind as a means to receive revelation.